What happens in Vegas doesn't stay in Vegas when it comes to Britney Spears’s megawatt show on the Strip. The pop princess received a hero’s welcome in December 2013 when she arrived in Sin City and, by all accounts, she’s made a great addition to the star-studded town.

In fact, last we heard her “A Piece of Me” concert has already outsold the likes of established Vegas acts like Elton John, Rod Stewart, and — hope you’re sitting down for this — the grande dame of the town, Celine Dion. We also know Brit’s popular show has drawn the likes of Selena Gomez, Katy Perry, and most recently, Nicole Richie to Planet Hollywood for a piece of her.

Nicole actually just attended Britney’s show last night and even ended up on stage! She’s got the Instagram photos (featuring vintage Brit t-shirt) to prove it.

Unfortunately, however, the 32-year-old diva was caught lip-synching during that very same performance. A social media-savvy fan captured the mistake while filming Brit strutting down the catwalk. While it’s hard to make out much of Brit from the low-quality footage, it’s very obvious her mic isn’t anywhere near her mouth when the backtrack starts up.

It would be easy to miss your cue with that roaring crowd, so we’re going to give Brit a pass on this one. After all, much more embarrassing things have already happened to her in Vegas.

Sources: Nicole Richie on Instagram, Sam Camberato on Instagram


Elisabeth Kramer is an Assistant Editor at Wetpaint Entertainment and our resident Downton Abbey expert. Follow her on Twitter and Google+!