Celebrity Tweets 2/20 and 2/21

Celebrity tweets about big announcements, family, sleep, and music, lit up Twitter today.

Kim Kardashian found an old family photo that she posted for laughs.

“How funny is this old pic I found!?” she wrote. “@KendallJenner is not enjoying this! LOL So cute.”

Carey Hart and Pink are still making memories in their family. They welcomed their daughter, Willow Sage, last summer and Carey enjoys the time with his daughter, but like any baby, they have two different sleeping schedules.

“I absolutely love my night time with my daughter. Dinner, bath, and bed time,” Carey Hart wrote. “My wife gave me the best gift ever.”

Carey may not like sleepless nights, though.

“I think my kid is on Europe time,” he wrote.

Babies weren’t keeping Miley Cyrus and Demi Lovato up at night, but hunger and illness were.

“I can never fall asleep when I'm hungry :( Thanks Adult Swim for keeping me company!” Miley Cyrus wrote.

“Ughhh sick and can't sleep.... #helpme” Demi Lovato wrote.

Rihanna and Chris Brown are back together, musically that is. The singers confirmed the much-speculated rumors that they collaborated by revealing, via tweet, the new remixes of their songs “Birthday Cake,” and “Turn Up the Music,” which feature each other.

“@chrisbrown Turn up the music remix #RihannaNavy #Teambreezy enjoy!!!” Rihanna tweeted.

“@rihanna YIKES!!! Cake, cake, cake!” Chris Brown wrote. “#RihannaNavy Come and put ya name on it!!!!!” she responded.

Perez Hilton gave a colorful reaction to Rihanna and Chris Brown’s new songs: “GENIUS!!!! @Rihanna and @ChrisBrown just mind-f--ked the world!!!!” he wrote.

While Rihanna and Chris Brown continue to make headlines, Jersey Shore’s Pauly D revealed he has a pretty big new gig.

“Excited To Be DJ'ing The @OKMagazine OSCAR PARTY In LA This Thursday!! #OhYeaOSCARSYea!!” he wrote.

Pauly D’s Shore castmate, Snooki, also learned something new today.

“OMG just went to go to my fav store and they moved! This is a sick joke,” she wrote.

Demi Lovato also announced her big news later Tuesday.

“Lovatics-I wanted to tell you FIRST about a special I worked on with @MTV. It premieres March 6th at 10pm!! #staystrong”

Katy Perry also hinted at big news.

“I think it's gonna happen today,” she wrote in reply to a tweet that asked “should we tell them?”

Mariah Carey had a much more serious tweet this morning, she was still grieving the loss of her friend, Whitney Houston.

“#RememberingWhitney Whitney, my friend, I love you, I miss you,” she wrote attaching a tribute video. “Your legend lives on forever. youtu.be/qzMqD7gglJ8.

Today is also Fat Tuesday. Ian Somerhalder gave a big shout out to the day.

“Happy Mardi Gras!!!!!!!!!! Laissez les bons temps rouler!”