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 has wowed fans with her theatrical stage performances since she first hit the scene in 1998 — the first of a bevy of blond-haired teen beauties which included Christina Aguilera, Jessica Simpson and Mandy Moore. She's sold 62 million albums worldwide and had nine No. 1 worldwide singles. (Ida Mae Astute/ABC)
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