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

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Tickets for The Circus Starring Britney Spears tour go on sale Saturday, Dec. 6, but you can find out about pre-sale tickets at www.britneyspears.com. (Ida Mae Astute/ABC)
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