Britney Spears performed at the Big Apple Circus in New York on Tuesday, Dec. 2, 2008 as part of the Good Morning America Concert Series.

Britney’s new album, Circus, is in stores today.

Britney Spears sings “Womanizer” on GMA December 2

“Circus”

Looks like at least one person in attendance wasn’t pleased with the performance. Jayden James Federline cried as his mother performed on ABC’s GMA Tuesday morning.

Britney Spears, who is celebrating her 27th birthday this Tuesday, stands beside her tier-layer birthday cake.