Buzz Bites (1/21/11): Beyonce To Star In Clint Eastwood's 'A Star Is Born'

(Credit: Kevin Mazur/WireImage)

+ Beyoncé has been tapped to star in director Clint Eastwood's remake of the classic showbiz tale "A Star Is Born." (MTV News)

+ More performers have been added to this year's Grammy lineup, including Justin Bieber, Usher and Bruno Mars. (EW)

+ Here's a look at Christina Aguilera's somewhat disturbing recent behavior. (E!)

+ Check out Diddy-Dirty Money covering Far East Movement's Like A G6." (Idolator)

+ If you were wondering whether or not Jennifer Lopez and Mariah Carey were feuding, they're not. According to Jennifer Lopez, at least. (That Grape Juice)