Mariah Carey is on blast for her performance at this weekend's 2013 BET Awards. Don't misunderstand, the performance was flawless, mainly because she's accused of lip syncing. Of course, this isn't the first time Mariah has been accused of lip syncing. Remember that incredible montage on the American Idol finale? Yeah, they say she lip synced that, too! Of course, her hubby Nick Cannon is staunchly defending her. Because that's what he does...