The 35-year-old singer took to the stage at the AXIS auditorium in Planet Hollywood Resort & Casino as part of her Piece of Me residency. Belting out her hit track Work B**ch while wearing a plunging green leotard, Britney showcased her impressive moves in a tough dance routine. However, as one of her dancers accidentally grabbed her outfit in the wrong place, the mother-of-two's cleavage popped out.

Completely unaware of the malfunction, Britney continued with the performance, with her breast hanging out of the ensemble.

It's not the first time Britney's wardrobe has failed her during the Piece of Me shows. Back in October she was performing I Love Rock 'n' Roll when her bondage-inspired bra came unhooked. While the dancers came to her rescue, Britney had to hold the top in place for the rest of the song. She then reemerged to perform Gimme More wearing a denim vest over the bra, but it came undone once again, so one of the dancers gave the singer his own top.

Recalling the embarrassing malfunction in an interview with U.S. TV show Extra afterwards, Britney said: "Yeah, it was really tight around my neck. It was only the second time that I had worn it. I was on the guitar and it just popped! And I was like, ‘Oh my God!’ It’s never done that before so I just had to hold myself in, and then one of my dancers, Zack, he came and just put a shirt on me, so I had a huge nightgown on stage, which was kind of invigorating - it was cool."

During a show in October 2015, Britney had another outfit accident when the back of her bodysuit came unzipped and she had to run off the stage afterwards to quickly get changed before her next song.