This could have been disastrous, but she's a pro!
Britney Spears was getting ready to crank up the dancing for her performance of Do Something on Friday night in Las Vegas, but she was too fierce for her weave!
It ran away from her head!
Right as Brit Brit was prancing across the stage, her blonde locks fell right off, giving Miz Spears an instant haircut!
But she didn't miss a beat because she's a professional!
Ch-ch-check it out