Justin Bieber Totally Transforms to Lip-Sync Ozzy Osbourne's "Crazy Train"

You've never, ever seen Justin Bieber perform quite like this before. In this clip from Thursday's episode of Lip Sync Battle with Justin and Deion Sanders, the singer rocks a long, dark wig and black eyeliner to lip-sync to Ozzy Osbourne's song "Crazy Train," making all kinds of wild facial expressions throughout his performance. During the show, Justin also surprised the crowd when he performed Fergie's "Big Girls Don't Cry." The singer's fun lip-sync moments come just a couple months after he won over fans with his carpool karaoke session, belting out some of his biggest hits alongside James Corden. Watch the Lip Sync Battle clip above, then check out a throwback video of Justin performing with Taylor Swift.