Britney Spears' "Circus" Comes to Town

Britney Spears celebrated her birthday with a pair of performances on "GMA."

PHOTOS: Britney Spears' 'Circus' Comes to Town

Britney Spears
Britney Spears
Britney Spears
Britney Spears
Britney Spears
Britney Spears
Britney Spears
Britney Spears
Britney Spears
Britney Spears
Britney Spears
Britney Spears
Britney Spears
In September, Spears made a triumphant return to the 2008 MTV Video Music Awards, winning three Moonmen, including video of the year, best female video and best pop video for her hit "Piece of Me." On Nov. 6, she made a cameo appearance at the Dodger Stadium show of Madonna's Sticky & Sweet Tour. Midway through "Human Nature," Spears joined Madonna on stage. (Jessica DiPietro/ABC)
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