Oops, Britney Wasn't Ready to Do It Again!

Where in the world is Britney Spears? 

I can tell you that she was supposed to be at Ivan Kane's Forty Deuce in L.A. last night for a surprise close-to-midnight performance. However, the embattled baldy nixed the plans just a few hours before she was to hit the stage. 

Kane is surprised she pulled out. "She came on stage during rehearsal, looking very hot, with four backup dancers and sang three songs," he is quoted as saying on the club's Website. "They ran through the set several times, the choreography was smokin', and she sounded great."