1 / 13

Fabolous (@myfabolouslife) - TWEET:"#iJustRealizediDontKnowMoreThanOneBarOfRacksOnRacksOnRacks" Fab makes a funny observation about YC's wildly popular "Racks" song. (Photo: Fernando Leon/PictureGroup)

2 / 13

Nicki Minaj (@NICKIMINAJ) - TWEET: "OH MY f'ingggg Gahhhh!!!!! MADONNA jus kissed me!!!!! On the lips!!!!!!! It felt sooooo good. Soooo soft!!!! *passes out* aaahhhhh!!!!!!!!!"While on the set of the video for "Give Me All Your Love" Nicki Minaj swoons over receiving a kiss from legendary pop singer Madonna.  (Photo: Christopher Polk/Getty Images for Clear Channel)

3 / 13

Tyrese (@Tyrese) - TWEET: "Wisdom is knowledge and awareness applied .... Remain a student of life so you're never beyond learning and growing..!!"Tyrese shares a few wise words. (Photo: John Ricard / BET)

Photo By Photo: John Ricard / BET

4 / 13

Adele (@OfficialAdele) - TWEET: "Right! Its me! I will start tweeting if 10k of u start following @drop4drop &their trip to India this wk. Its a wonderful charity. Go! A xxx" Adele's staff has been tweeting on her behalf for a while but this week she got on the social networking site herself to promote an important cause.  (Photo: Kevin Winter/Getty Images)

Photo By Photo: Kevin Winter/Getty Images

5 / 13

Rihanna (@rihanna) - TWEET: "Its @NICKIMINAJ Birthday...and I wanna lick the icing off! I want dat #CAKE --- Happy Birthday Barbz! From me and Sista Dolly lol"Rih Rih references her new song "Cake" in a birthday shout out to friend Nicki Minaj. (Photo: M Vaudrey/PictureGroup)

6 / 13

Wiz Khalifa (@RealWizKhalifa) - TWEET: "Make Sure U Get My Homie @TPAIN 's Album Revolver Now!!!"Wiz promotes the release of T-Pain's album RevolveR, on which he's featured on the popular single "5 o'clock." (Photo: © Gene Ambo / Retna Ltd.)

7 / 13

Keri Hilson (@MissKeriBaby) - TWEET: "He asked my sign. I said a sag. I'm a star. Sheriff badge." HAPPY BURFDAY @NICKIMINAJ!! Slappin age-worth of #KerimelKisses on dat ass ;)"Miss Keri sends "Kerimel Kisses" and birthday wishes to Nicki Minaj on her birthday.  (Photo: UPI/Michael Bush /LANDOV)

Photo By Photo: UPI/Michael Bush /LANDOV

8 / 13

Ledisi (@ledisi) - TWEET: "Christmas is not Christmas until....... I hear Donny Hathaway's 'This Christmas'"Ledisi shares what gets her in the Christmas spirit. (Photo: Kevin Winter/Getty Images)

Photo By Photo: Kevin Winter/Getty Images

9 / 13

Willow (@OfficialWillow) - Tweet: "Fireball video is about to premiere on @106andpark #FIREBALL #getready"Willow announces the release of her latest video "Fireball" with Nicki Minaj.(Photo: Frank Micelotta/PictureGroup)

10 / 13

Mary J. Blige (@maryjblige) - Tweet: "Fam! Thank you for watching and supporting me on XFactor tonight!! I really appreciate you!!"Mary J. thanks fans who tuned in to catch her performance on the music competition television show The X Factor Thursday night.(Photo: Kevin Winter/Getty Images for Nickelodeon)

11 / 13

Trina (@TRINArockstarr)  - TWEET: "I wish I cld reply to each and every one of u... I'm so thankful for all of your bday wishes... I LOVE U guys w/ ALL my ❤" Trina thanks her fans and friends for all the birthday love. (Photo: John Ricard / BET)

Photo By Photo: John Ricard / BET

12 / 13

Diggy Simmons (@diggy_simmons) - TWEET: "Make sure u tune into @106andpark 2 see me premiere the #DoItLikeYou video. Beyond proud of this. @philthegod U deserve an award 4 this sir!"Diggy Simmons announces last week's appearance on 106 and Park, where he debuted the video for his "Do It Like You" single.  (Photo: Terrence Jennings/PictureGroup)

13 / 13

Drake (@Drake)  - TWEET: "One night in the club @KevinHart4real sent me 30 waters with mad sparklers...and gave me the Ace Of Spades Rose Magnum nod as it showed up."Drake sticks a jab at comedian Kevin Hart.(Photo: John Gunion/Redferns)