Britney Spears, Las Vegas resident and person who has been accused of lip syncing lots of times, has been accused of lip-syncing. On Monday, August 18, a video emerged of a live performance of the Sia-written "Perfume" that some claim sounds like Sia's vocals playing (whilst Spears simply clutches the microphone).

Billboard speculates that Sia's track was likely used "as an in-monitor guide when she sings ... [and] was put into the house mix, making for an embarrassing accident."

Of course, this comes on the heels of of various lip-syncing accusations that Spears' manager, Adam Leber, confirmed in a recent interview with Medium. “To put on the show that she puts on, it’s virtually impossible to sing the entire time and do what she does,” he said. “She’s singing on every song, basically, when she has the ability to sing. There’s no way you can dance for 90 minutes straight and sing the entire time.”

Okay? So, yes, there is some lip-syncing in Las Vegas. Maybe with that low-res Instagram video of "Perfume," or maybe not. But are we really so shocked that maybe she is not the best singer? Hello, un-Auto-tuned "Alien" / basically everything that has happened since the early 2000s. Bless her sweet heart, but the reason to love Britney is not her vocals.