Musical performances at 52nd Grammys

Lady Gaga, center, performs at the Grammy Awards on Sunday, Jan. 31, 2010, in Los Angeles. (AP Photo/Matt Sayles)

Lady Gaga performs at the Grammy Awards on Sunday, Jan. 31, 2010, in Los Angeles. (AP Photo/Matt Sayles)

Beyonce performs at the Grammy Awards on Sunday, Jan. 31, 2010, in Los Angeles. (AP Photo/Matt Sayles)

Leon Russell performs at the Grammy Awards on Sunday, Jan. 31, 2010, in Los Angeles. (AP Photo/Matt Sayles)

Lady Gaga is carried by a dancer as they perform 'Poker Face' at the start of the 52nd annual Grammy Awards in Los Angeles January 31, 2010. (REUTERS/Mike Blake)

Pink performs 'Glitter in the Air' at the Grammy Awards on Sunday, Jan. 31, 2010, in Los Angeles. (AP Photo/Matt Sayles)

Green Day and the cast of American Idiot perform at the Grammy Awards on Sunday, Jan. 31, 2010, in Los Angeles. (AP Photo/Matt Sayles)

Singer Pink performs at the Grammy Awards on Sunday, Jan. 31, 2010, in Los Angeles. (AP Photo/Matt Sayles)

Beyonce performs at the Grammy Awards on Sunday, Jan. 31, 2010, in Los Angeles. (AP Photo/Matt Sayles)

Beyonce performs at the Grammy Awards on Sunday, Jan. 31, 2010, in Los Angeles. (AP Photo/Matt Sayles)

Lady Gaga, center, performs at the Grammy Awards on Sunday, Jan. 31, 2010, in Los Angeles. (AP Photo/Matt Sayles)

Jennifer Lopez introduces a performance by Green Day at the 52nd annual Grammy Awards in Los Angeles January 31, 2010. REUTERS/Mike Blake

Pink performs 'Glitter in the Air' at the Grammy Awards on Sunday, Jan. 31, 2010, in Los Angeles. (AP Photo/Matt Sayles)

Pink performs 'Glitter in the Air' at the Grammy Awards on Sunday, Jan. 31, 2010, in Los Angeles. (AP Photo/Matt Sayles)

Pink performs 'Glitter in the Air' at the Grammy Awards on Sunday, Jan. 31, 2010, in Los Angeles. (AP Photo/Matt Sayles)

Beyonce performs at the Grammy Awards on Sunday, Jan. 31, 2010, in Los Angeles. (AP Photo/Matt Sayles)

Zac Brown performs at the Grammy Awards on Sunday, Jan. 31, 2010, in Los Angeles. (AP Photo/Matt Sayles)