No one likes a faker. Mariah Carey came under fire Sunday night after her performance at the BET Awards sounded a little too perfect.While performing “Beautiful” with Miguel and Young Jeezy at Sunday night’s awards show, the songstress was accused of lip syncing by fans on Twitter. One fan tweeted: “Mariah. Do us all a favor. Don’t put your finger in your ear like that when it is obvious you are lip syncing. It’s embarrassing.” Another wrote: “OHHH so i wasnt bugging… Mariah Carey is horrible at lip syncing lol.”This isn’t the first time Mariah’s been accused of using pre-recorded vocals, either. The “American Idol” judge got some heat for reportedly faking her performance during the singing competition’s season finale just a few months ago. But Mariah isn’t the only one staying silent onstage. We all remember when Beyonce admitted to using a pre-recorded track during her performance of the “Star-Spangled Banner” during President Obama’s inauguration back in January. And that time Ashlee Simpson’s song started playing without her even knowing it during a 2007 “SNL” performance. And what about Milli Vanilli, huh? What do you think? Make sure and connect with me on my facebook page by clicking here.