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
Spears began her career as a teen pop sensation, who eagerly served up catchy bubblegum beats sure to get any prom party started. Since then, she has become a staple of the music scene with every release selling millions to the masses. (Ida Mae Astute/ABC)
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