After a mini-tour through talent shows all over Europe to perform her latest single “Womanizer“, Britney Spears got back to New York to celebrate her 27th birthday and the release of her new album “Circus” with a very special performance on Good Morning America.

Spears showed off her newly-fit figure wearing a belly-baring black top, skin-tight pants and top hat as she took the stage at the Big Apple Circus Tent. The star unleashed a team of dancers dressed as clowns and circus freaks who were caged behind her, and later re-emerged from a ring of fire wearing booty-bearing shorts, black fishnets and a cropped red top as she continued her lip-synced remix of songs.

But the Toxic hitmaker was in for her own surprise when fellow stars Hugh Jackman, Reese Witherspoon and Taylor Swift wished her a happy birthday in a video montage - and she was then presented with a towering cake.

Smiling, Spears told the roaring crowd, “That’s so sweet thank you,” as her two sons, Sean Preston, three, and Jayden James, two, watched from the front row with the singer’s mum, Lynne Spears.

It seems like Britney has regained some confidence on stage but there is still a long way to go before she can wow us again. Britney is preparing to go on tour starting in her hometown Louisiana (March 2009).

Britney Spears’ Good Morning America Performances Videos>>

Britney Spears Announces Circus World Tour Dates>>

Watch Britney Spears’ Performances of “Womanizer” in Europe:

Sexy Britney Spears Performs Womanizer At Bambi Awards (Germany)
Britney Spears Performs Womanizer At Star Academy (France)
Britney Spears Performs Womanizer On X Factor (UK)

40+ Photos of Britney Spears “Circus” Good Morning America Special Performance below

[images: WENN]