Mariah Carey is being called out on her performance at the BET Music Awards on Sunday (June 30), with viewers complaining that the singer was clearly lip-syncing during her performance with singer Miguel and rapper Young Jeezy. Although it isn't uncommon for singers to lip-sync their parts at award shows that are prone to sound interruption and involve exhaustive dance routines, the singer has still been called out on her performance.

MAriah Carey Video
Mariah will have to defend herself against the accusations.

Just over a month after she had to deny lip-syncing a medley of her greatest hits during the American Idol finale, the singer has to answer to the naysayers once again. The singer was performing her new single '#Beautiful,' with a guest verse from Jeezy, and during the high-octane performance the singer seemed to be singing, on occasion, with the help of a backing track.

One person who did seem to think his wife would be letting her fans down was her husband Nick Cannon, who had nothing but good things to say of his wife's impending performance on the red carpet before the awards show.

Mariah Carey Studio
The singer performed with Miguel and Young Jeezy

"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 said to 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."

No word from Mariah yet as to whether she was lip-syncing, but knowing Mariah she will address the situation at some point soon.

Mariah Carey Live
So, was she lip syncing or not?