Mariah Carey is facing some criticism after her performance at the BET Awards on Sunday night seemed a little too perfect.

The “Beautiful” singer was accused of lip-syncing during her performance at the “American Idol” finale last month–which she denied–and now some think she used a backing track for her vocals at the awards show, when she sang with Miguel and rapper Young Jeezy. Of course, getting a helping hand during a big, televised event isn’t uncommon, but fans feel cheated when news comes out that a great performance wasn’t actually live (remember the Beyonce/inauguration debacle?).

Carey hasn’t addressed the latest rumors, but her husband Nick Cannon spoke about her performance before the awards show, saying that everything she does is done to perfection.

“My wife is a perfectionist and clearly because she’s done it right all her life. So she actually puts a lot of work into these performances,” Cannon told E! News. “There’s no management helping make decisions. Everything you see is all her, whether it’s a collaboration when the lights hit, how she enters, she’s doing all of that.”

If Mariah Carey lip synced, so what. There's only 2 ppl in the world who can lip sync & get away with it, Mariah and Beyonce! Thats it.

— IG: imatt1986 (@xoxoMatt86) July 2, 2013

Big wooh wooh, Mariah Carey lip sync… uhmmm, maybe she had a reason. it's not like its not her voice. #MSM blows chunks on that one.

— kimroc1 (@kimroc1) July 2, 2013

Why does mariah carey lip sync she's probs the only artist that shouldn't need to

— Emma (@emmapenno) July 2, 2013

Mariah Carey = THEE Worst Lip Sync singer EVER

— Olivia Simone. (@Incredibly_Muah) July 1, 2013

Everyone knows Mariah Carey lip sync that performance at the BETawards,

— /mars blackmon. (@woodboness) July 2, 2013

Mariah Carey lip sync just as much as Jeezy rhymes about cocaine

— Chris Smith (@iTsBlackChris) July 1, 2013