Country singer Kellie Pickler showed off her toned, beach body with a picture she posted on Instagram. She tweeted "Beach Bum :-)" on Sept. 4, 2013.

Christie Brinkley shared snaps of herself and daughter Alexa Ray Joel on Instagram, while on a fishing trip in the Hamptons, Aug. 15, 2013. She wrote: "It's no fluke that we're having fun... Cause were together on the water! @ryanjgleason @alexarayjoel."

Kate Upton posted this photo on twitter July 23, 2013, with the caption, "Rough life @BeachBunnySwim."

Katherine Heigl posed this photo to her twitter on July 4, 2013 with the caption, "Happy 4th of July to all those celebrating today! Xoxo the Kelley's!!"

Lisa Rinna uploaded an Instagram shot on June 22, 2013 with the caption, "I went blonde. Now lets see if they have more fun."

Patrick Schwarzenegger posted this photo of himself on twitter, June 7, 2013, with the caption, "Early morning pump! Who is getting into shape for summer??!! Gonna gain 7 pounds this summer."

Gisele Bundchen tweeted this photo with the caption, "Minha nova coleção Gisele Bündchen Intimates .Espero que vocês gostem!😉💋 My new Gisele Bündchen Intimates collection. I hope you like it! #lingerie #sexy," on June 7, 2013.

Kylie Jenner posted this photo to her Instagram with the caption "missing you, Greece xx" on May 25, 2013.

Jenni "JWoww" shows off her new physique in this photo she posted to her Instagram account, April 30, 2013. "2 weeks into my new workout program... 10 to go! Can't wait to share my results! #lifting," the reality star tweeted.

Justin Bieber and Selena Gomez reunite in shirtless photo posted on Instagram, April 26, 2013. He posted this caption with the picture: "You've been makin music for too long babe come cuddle" -her."

Chelsea Handler tweeted this image of her as a teenager on April 27, 2013. She tweeted "Jersey sisters."

Kate Upton tweeted "Cuddling with my favorite tiger :)" on April 5, 2013. She was photographed with a baby tiger for a Harper's Bazaar portfolio shoot.

Rihanna posted this picture of herself to her Instagram account Saturday morning, March 23, 2013. The 25-year-old stuck out her tongue as she devoured a jewel shaped chocolate. She captioned the image: 'Chocolate#diamonds'.

Kelly Osbourne, who had a seizure on the set of her "Fashion Police" show on March 7, returned to work on the E! show March 21, 2013. Co-host Joan Rivers shared a photo of herself with the 28-year-old on set. "Welcome back Kelly!!! THRILLED to have my darling @MissKellyO back on set at @e_FashionPolice. XOXO," she tweeted with the photo.

A "Twilight" fan posted proof that Robert Pattinson and Kristen Stewart have been spending time together since his return from Australia, where he spent two months filming. The couple was spotted at Ye Rustin Inn in L.A., where an Us Weekly source said they were cuddling, stealing kisses and flirting.

Gerard Butler tweeted this photo of himself with his parents before taking them to the Los Angeles premiere of his latest film, "Olympus Has Fallen," on March 18, 2013. "Folks in town for the premiere. My mum loves watching me kick some a** (especially when it's the bad guys)," he wrote.

Nicki Minaj tweeted stunning photos of herself in couture on March 7, 2013. The "American Idol" judge tweeted: "And yet more #McQueen realness."

Nick Carter, 33-year-old Backstreet Boy singer, tweets a photo of his proposal to Lauren Kitt on Feb. 22, 2013. The singer tweeted: "Big question...great answer."

Beyonce shared a photo on Instagram of herself in New Orleans at Mother's Restaurant. "NOLA," she said with the photo. Beyonce's mother is originally from New Orleans. The singer put the restaurant's menu curiously over her mouth in the midst of her lip-syncing controversy.

Mariah Carey tweeted this photo of her 20-month daughter Monroe applying powder to her face on Jan. 11, 2013. From her twitter account @MariahCarey, she <a href=" http://instagr.am/p/UXOGoqLeI0/" target="external">wrote:</a> "Beauty school hour 01 lol".

Miranda Kerr gives some holiday cheer via an Instagram picture she posted on Twitter with the message, "Santa's little helper," Dec. 23, 2012.

Miranda Kerr is tutu cute. The 29-year-old Victoria's Secret model tweeted a photo of her in a hot pink bra and tutu on Nov. 28 with the caption "Going up..."

Ashley Tisdale had a fun filled beach day with her mom on Nov. 23, 2012. She and her mom posed in swimsuits and <a href="https://twitter.com/ashleytisdale/status/272031791815217153" target="external">tweeted</a>: "I got It from my momma.... #legs."

Vanessa Lachey posted this image on her <a href="https://twitter.com/VanessaLachey/status/271662007210631168">Twitter page</a> with the note, "Oh no!!! My Turkey is making a run for it! Happy Thanksgiving Everyone!," Nov. 22, 2012. The television personality's son Camden John Lachey was decked out in festive attire.

"Baby One More Time," indeed. Though it's been years since Britney Spears' debut hit ruled the airwaves, the cheeky schoolgirl outfit she wore in that video has resurrected itself on Spears' 4-year-old niece, Maddie. On Oct. 2, Spears' sister, former Nickelodeon star Jamie Lynn Spears, Instagrammed the above photo of her daughter in costume for "Celebrity Day" at her school.

Jessica Simpson tweets a black and white photograph with daughter Maxwell Drew on Sept. 19, 2012, for her fiance Eric Johnson's 33rd birthday.

Bobbi Kristina Brown's boyfriend, Nick Gordon, tweeted a photo of himself Sept. 18, 2012 driving with one hand and holding a gun with the other. It is unclear whether or not the gun is real or a toy. The photo was later deleted. Rumors have swirled around Gordon and Bobbi Kristina's relationship since Whitney Houston's death. The pair has yet to officially confirm if they are dating.

Since giving birth last month, Nicole "Snooki" Polizzi has been bonding with her baby Lorenzo. The"Jersey Shore" star tweeted a photo of the duo Twitter on Sept. 15, 2012. "I love you," she <a href="https://twitter.com/snooki/status/247020634863960064" target="external">tweeted</a> at her handle, <a href="https://twitter.com/snooki" target="external">@snooki</a> along with the picture.

Stars rocked some pretty crazy outfits at this year's MTV Video Music Awards but Ke$ha waited until the last moment to put on her racy black dress. The singer posted a photo to Instagram of her getting ready before the show. The shocking twist? She was totally nude. "Just naked brushing my teeth pre VMAs," she tweeted.

Kate Bosworth confirms her engagement to director Michael Polish by tweeting a photo of herself wearing her engagement ring. "This photo was taken by my husband-to-be!' she wrote on Twitter Sept. 4, 2012. "Thank you all for the wonderful engagement wishes... We feel truly blessed."

Brushing rumors aside that she had a threesome with a porn star, Kim Kardashian tweets out this photo of her nuzzling boyfriend Kanye West, along with the message, "Hi," on Aug. 22, 2012.

When Alec Baldwin wed yoga instructor Hilaria Thomas June 30, he fought to keep all wedding details under wraps to keep the paparazzi out. But for his 8,000th tweet, the "30 Rock" star shared a photo of the actor with his blushing bride on their wedding day. "My 8000th tweet is a smile to @hilariabaldwin," he tweeted along with the photo.

Talk show host Anderson Cooper posted photos to Instagram Aug. 15, 2012 of his vacation in Croatia. Pal, and fellow talk show host, Kelly Ripa joined Cooper on the trip.

Pretty soon there will be a little gorilla running around the Jersey Shore. Reality star Nicole "Snooki" Polizzi showed off her growing baby bump on Instagram Aug. 8, 2012. "Relaxin with child," the 24-year-old tweeted alongside the photo. Earlier she told fans on Twitter, "Yes I know I'm a pregnant whale." The MTV star announced she is having a boy with fiancé Jionni Lavalle.

Harper Beckham's off and running. The first steps of Victoria Beckham's daughter were captured by publicist Caroline Kennedy on Twitter July 16. 7-month-old Harper is seen tottering across Beckham's clothing showroom in Dublin, Ireland.

Roller coasters are a family affair for Kim Kardashian. The reality TV star tweeted this photo on July 17 saying, "Magic Mountain fun today!!! Kendall screaming, Kanye laughing & me crying!" Later in the day, she added, "I officially am afraid of heights now."

Though she's famous, Willow Smith is just a regular kid. Mom Jada Pinkett Smith tweeted this image of her daughter sleeping on dad Will Smith, writing, "Being a fatherless daughter these are the moments I cherish. Love. J."

Hugh Hefner's back with 26-year-old girlfriend Crystal Harris and happier than ever. During his annual Fourth of July bash, the 86-year-old Playboy honcho tweeted, "My honey & I" along with this photo.

Chris Brown posted this photo of a gash on his chin shortly after his nightclub brawl with Drake.

Kim Kardashian poses for a portrait with her sisters, Khloe and Kourtney.

Five months after her highly publicized split from Ashton Kutcher, Demi Moore is back on Twitter and still using her '@mrskutcher' moniker. A photo of Moore, who just finished rehab at the Cirque Lodge, that shows her lying on a bed surfaced late Sunday night, with the simple message "Testing...." on the social networking site.

22-year-old Pauline Gretzky, daughter of hockey legend Wayne Gretzky, is back on Twitter with another photo. Gretzky, famous for posting risque pictures of herself online, closed her account last week. The new picture lives up to the 22-year-old's reputation: here she poses suggestively in a white T-Shirt that screams SEX in large black letters.

Like mother, like son. Britney Spears brought her young son Sean Preston on stage at the Budapest stop of her Femme Fatale world tour. She tweeted this image from her Twitter account, @britneyspears.

Newlywed bliss! Tara Reid tweeted this picture of herself alongside new hubby Zachary Kehayov with the caption "Love," just days after their wedding in Greece.

Courtney Stodden, 16, posted a photo of herself in a revealing red bathing suit, tweeting "Court does Pam! XO's." Courtney<a href="https://twitter.com/#!/CourtneyStodden"> tweeted </a>about the Baywatch-themed shoot before her big reveal, writing "A soft sensation sweetly kisses my body as I prepare for a sexy hot photo shoot this afternoon. What a breathtaking morning it has been!" The model/actress/dancer recently caused headlines with her marriage to 51-year-old actor Doug Hutchison.

Kate Hudson's fiancé Matt Bellamy posted a photo of their son Bingham "Bing" Hawn Bellamy on his Twitter page (@MattBellamy), writing, "Family life!" In the photo, Hudson, 32, cuddles their son, who was born in L.A. on July 9.

David Beckham rubs noses with the newest addition to his family, Harper Seven. His wife Victoria Beckham wrote on her Twitter page, "Daddy's little girl! X VB X."

Victoria Beckham expressed her love for her family's newest addition Harper Seven on her Twitter page, writing that she had "fallen in love all over again."

Mariah Carey posted a photo of her daughter Monroe Cannon blocking a camera with her hand on Twitter. Carey wrote, "This is baby Monroe saying 'no pictures dahhhhling' at 7+1/2 weeks." Carey and husband Nick Cannon became the proud parents of twins on April 30, 2011. Their son's name is Moroccan Scott Cannon.

Jodin Sparks tweeted, "I don't know why but my bathing suit reminds me of fruity pebbles. :) "

Demi Moore posted a photo of herself with hydration mask on her Twitter page. She wrote, "hydration mask, anyone?"

Serena Williams posted this photo on her Twitter page, writing, "Look who I spotted on the court. Her first day back." The tennis star wore a one-piece flourescent lyrcra suit on the court.

Kelly Osbourne posted a photo of her sunburnt body on her Twitter page, writing, "my suburn from Runyon. Not cool." The reality star was referring to Runyon Canyon, a place where people go hiking in California.

Actor Charlie Sheen has a set a new record on Twitter for the fastest time to reach one million followers. Sheen gained one million Twitter followers in 25 hours and 17 minutes, Guinness World Records confirmed. When the actor joined the tweeting masses March 1, he described himself as an "unemployed winner." Along with this photo, Sheen tweeted, "Winner..! 2012..."

Singer Pink tweeted this image of her baby bump Feb. 6, 2011, writing, "ALRIGHT... because paparazzi of today have absolutely no photograhic skill or artistry whatsoever, and their pictures are hideous.... I'm going to post a self-portrait I took yesterday morning for all of you asking to see belly shots. 3 wks of photo classes for me... and I am already a far better photographer than any one of them....."

Brtiney Spears posted a sneak peek photo on her Twitter page of her new video "Hold It Against Me" with the caption: "Day 1 of the HIAM shoot with Jonas Akerlund. Such an incredible experience. I think this will be one of the best videos I have ever done."

Does Jessica Simpson have a new, hair-raising hairstyle for 2011? Fortunately, no. The singer's majorly teased hair was for a magazine photoshoot. Her publicist Lauren Auslander tweeted the photo, writing jokingly, "Hey @JessicaSimpson nice new 'do for 2011."

Lindsay Lohan promoted an advertisement for gift cards on her Twitter account Dec. 15, 2010. A spokesperson for TaDa, the company behind the link the Mean Girls star tweeted, had no comment on Lohan's work for the company or how much she was paid.

Lance Armstrong posted a photo of his daughter Olivia Marie on Twitter, writing "hanging poolside with a beautiful little lady." Armstrong was in Miami with his family.

Rapper 50 Cent stacked half-a-million dollars in $100 bills like Leggos on his Twitter page. He even posted a photo of the money in the shape of a heart, writing, "Who said I don't have a heart?"