Britney Thinks You're A Bitch!

Oops, she did it AGAIN!!!!!!

For some reason, the sound engineers leave Britney's microphone on during her concerts. While she doesn't sing live, she has been known to blurt out really random things.

Monday night was no exception!

Watch the clip above - just after the 3 second mark - to hear what Brit Brit said during one of the dance breaks at her Houston show yesterday.

Source: PerezHilton.com