Buzz Bites (1/9/12): Rihanna, Diddy, More Celebs Congratulate Beyonce & Jay-Z On Birth Of Blue Ivy

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+ It's a girl!!! Congrats to Beyoncé and Jay-Z on the birth of daughter Blue Ivy. Bey's sis Solange, Rihanna, Diddy, Young Jeezy, Russell Simmons and other celebs tweeted their love. "Welcome to the world Princess Carter!" wrote Ri. (MTV News)

+ Katy Perry tweeted about her split with Russell Brand. It's the first time she's publicly addressed they're divorcing. She thanked supporters and also tweeted, "Concerning the gossip, I want to be clear that NO ONE speaks for me." (MTV News)

+ Watch Kelly Clarkson's powerhouse performances of "What Doesn't Kill You (Stronger)" and "Mr. Know It All" from "Saturday Night Live." (Neon Limelight)

+ "The Voice" panelists Cee Lo Green, Adam Levine, Christina Aguilera and Blake Shelton will be joined by celebrity advisors Ne-Yo, Kenny "Babyface" Edmonds, Alanis Morissette, Robin Thicke, Jewel, Lionel RichieMiranda Lambert and Kelly Clarkson this season. (Rolling Stone)

+ It's 2012 -- time for another installment of "Weezy's Sports Corner." Lil Wayne launched eight new webisodes, where he chats about pro sports, college sports and skateboarding. 49ers linebacker Aldon Smith is his guest. Peep 'em here. (Rap-Up)