Even the Warlock himself, Charlie Sheen, took a break from his own troubles to tweet his concern for the quake and tsunami victims.
Sheen wrote: "Curveball; Warlock edict; pain & devastation in Japan demands us all to dig deep & LOVE THEM VIOLENTLY Dogspeed my cadres of the Far East! C"
P. Diddy expressed his shock: "Oh man yall see this earthquake in japan??????!!!!!! Let us pray!!!! God bless Japan!"
There were plenty of prayers on the networking site.
"My prayers and love is with all of those in Japan. Wow my heart is breaking with every image I see. So sad! Praying hard!" Khloe Kardashian tweeted.
"So devastating to hear about the huge earthquake and tsunami Japan. My thoughts and prayers are with everyone there," "Glee" star Lea Michele wrote.
For celebrities, the news of the 8.9 quake hit especially close to home. Many stars do publicity and perform in Japan. Moreover, the tsunami triggered by the massive earthquake was expected to reach Hawaii and parts of the West Coast.
"Dancing With the Stars" co-host Brooke Burke expressed worry about her Malibu home. "Watching the tsunami news," she tweeted. "Our phones blowing up since 2am. Malibu trying to figure out what to do."
Hip-hop singer Nicki Minaj retweeted tsunami facts and preparedness tips from the Red Cross.
Back from a recent tour stop in Japan, Katy Perry wrote, "My prayers go out to anyone that is being effected by the disaster in Japan ... #prayforjapan."
For Australian cricket star Shane Warne -- Liz Hurley's new boyfriend -- the Japanese tragedy came too soon after the Christchurch, New Zealand, earthquake. "Just heard about japan -- another terrible tragedy.. Our hearts go out to all of you who have been effected -- so sad ..." he tweeted.
Later, he added: "Goodnight -- everything crossed for people in japan and for the people who have a tsunami warning. No more natural disasters please -- can't cope"
Below, a roundup of other celebrity Twitter messages:
John Stamos: "Praying for japan."
Paris Hilton: "The images on the news are breaking my heart. I am so worried for everyone in Japan. My thoughts are with you Japan. God bless you all."
Paris' sister, Nicky Hilton: "Much love, thoughts & prayers to the country and people of Japan"
Pussycat Dolls' Nicole Scherzinger: "My heart goes out to all those affected by the earthquake and subsequent tsunamis. Pls keep Japan in ur prayers. God bless and be with them."
EvaLongoria: "My prayers are with you Japan!"
Actor Gilles Marini: "My heart goes to the people of Japan. To whomever lives by the cost beware of aftermath Tsunami! Be safe all!"
William Shatner: "My heart and prayers go out to the victims of the earthquake and tsunami. My best, Bill"
Model/actress Molly Sims: "My thoughts are with those in Japan, and those in danger on the Pacific Rim. #prayforjapan"