Buzz Bites (12/12/11): Watch Robyn Perform And Katy Perry Spoof On 'Saturday Night Live'

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+ Don't know about y'all, but this weekend's "Saturday Night Live" had me queueing up the DVR with their pop star twofer. Peep musical guest Robyn's rad "Call your Girlfriend" and "Dancing On My Own" sets, and watch host Katy Perry spoof Florence + The Machine's Florence Welch. (Consequence of Sound)

+ As SNL host, Katy Perry also lampooned Christina Aguilera, sang a "Teenage Dream" duet with Kristin Wiig and also played herself in a skit. (MTV News)

+ Check out Lady Gaga performing a sultry "White Christmas" at Z100's Jingle Ball in NYC. She added a few extra lines that would surely make Santa blush. Watch out, Mrs. Claus! (Rap-Up)

+ Kelly Clarkson and Demi Lovato dueted on "Have Yourself a Merry Little Christmas" at Z100's Jingle Ball. "Oh my God...#shaking. I. Just sang. With. Kelly. Clarkson. #ahhhhhhh," tweeted Lovato. (Just Jared Jr.)

+ Adele graces Billboard's cover and is the magazine's Artist Of The Year. 2011's No. 1 selling artist gave an email interview as she's still recovering from throat surgery. (Billboard)

+ Miley Cyrus teamed with brother Trace Cyrus to design a T-shirt and hoodie. Proceeds from the shirt sales will benefit Miley's charity Get Ur Good On. (Billboard)