Britney Celebrates 27th Birthday With GMA Performance
Posted on Tue Dec 2, 2008 07:58 AM PDT

Britney Spears BritGMA200.jpgLOS ANGELES, California (X17online) - Britney Spears celebrated her 27th birthday, as well as the release of her new album "Circus," with a performance on ABC's "Good Morning America," Tuesday morning.

Following in the circus theme, Spears - dressed as a ringmaster - was joined by clowns, jugglers and dancers in animal costumes as she performed "Circus" and "Womanizer."

Spears was also presented with a six-tier birthday cake and watched videotaped well wishes from a number of celebrities.

The singer also revealed the dates for her upcoming world tour, which will kick off in New Orleans on March 3rd and travel across the US, before winding up in Chicago on April 28th.

Tickets for shows go on sale Saturday.