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
Diane Sawyer and Robin Roberts presented Spears with a six-tier, 40-inch-tall birthday cake from Carlo's Bakery in New York. Buddy Valastro spent 60 hours on the elaborate cake, decorated with the "Circus" theme in mind. The caked weighed nearly 300 pounds and was made with 40 pounds of butter, 40 pounds of cream cheese and 50 quarts of cake batter. (Ida Mae Astute/ABC)
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