Oops, she did it again! Britney Spears had a wardrobe malfunction in Las Vegas.

According to Us Weekly, the zipper on the back of Spears’ outfit split open during her Piece of Me performance on Friday. The mishap happened during a performance of her song “3,” a hit single from 2009.

Spears motioned her backup dancers to zip up her zipper, but they were focused on the choreography that led them across the stage and did not get the message. Spears then added her malfunction into her dance moves and continued her performance with her back exposed.

Spears recently extended her Las Vegas residency. She is going to be at Planet Hollywood for two more years.

The “Pretty Girls” singer announced her extension on stage in September.

“Okay I have some big news tonight. Usually I get you guys to help me count to three, but tonight I want you to help me count to two because I’m going to be in Vegas for two more years!” Spears told the crowd.

Tickets for new performances of Piece of Me are currently on sale.