Britney's fabulous circus-themed birthday bash featured colorful jugglers, contortionists and of course musical tidbits from the pop star's new album. ET takes you inside the posh party at New York's Tenjune nightclub!

ET's Kevin Frazier roamed the party all night and caught up with one of Britney's old friends, Lance Bass, who said the bash marked a turning point for the pop princess and predicted she still has an "amazing" career ahead of her.

Keep checking back here for all of ET's exclusive Britney coverage!