5:41 p.m. ET: Get down, get down, get down at the White House!

Now we are rocking at the WH. Happy Inauguration. #2013inaug twitter.com/clairecmc/stat…

— Claire McCaskill (@clairecmc) January 22, 2013

ABC's Jon Karl reports: The president hosted a star-studded after-hours party in the East Room of the White House. Giddy celebrities took to Twitter to talk about how much fun they had partying down with the president and first lady.

Read the full story HERE

4:07 p.m. ET: DEVELOPING: The New Mexico teenager who used an assault rifle to kill his mother, father and younger siblings told police he hoped to shoot up a Walmart after the family rampage and cause "mass destruction." Police said they are also considering charging the shooter's 12-year-old girlfriend.

Read the developing story HERE

Credit: AP Photo

2:25 p.m. ET: Say it ain't so, B.

The band wasn't playing when Beyonce sang her rousing rendition of the Star-Spangled Banner at President Obama's second inaugurationMonday.

Did she lip-sync?

Read the full story HERE and watch the video of her inauguration performance HERE:

12:22 p.m. ET: EXCLUSIVE: FOOD FRAUD? A new scientific examination by the non-profit food fraud detectives the U.S. Pharmacopeial Convention (USP), discovered rising numbers of fake ingredients in products from olive oil to spices to fruit juice.

Get ABC's Jim Avila exclusive report HERE and watch the full story on "Nightline" tonight

Credit: Getty Images

10:13 a.m. ET: President Obama's second inauguration: The speech, the crowd's emotional response, the balls - and Michelle's fashion choices. Get the "Nightline" recap of yesterday's Inauguration events HERE:

The Speech:

The Glamour:

The Emotion: