Britney Spears has fans guessing about when she'll make her big comeback performance after reportedly pulling the plug on a show in Los Angeles late on Wednesday night. The singer was expected to take the stage with her band the M & Ms at hip Los Angeles club Forty Deuce, where she swapped costumes with dancers in December, but failed to show.

On the club's website, boss Ivan Kane says, "She came on stage during rehearsals, looking very hot, with four back-up dancers and sang three songs. They ran through the set several times, the choreography was smokin', and she sounded great."

But Spears decided that she needed more time to rehearse for her comeback performance, and left devotees disappointed. A handful of semi-secret shows are lined up for Los Angeles next week.

-Britney Spears Pictures

(This news article provided by World Entertainment News Network)