On Thursday's episode, the Biebs had to sing the king of darkness' "Crazy Train" and did an epically good job at it. Not only did he nail the words, but he also sported long hair and eye-liner, pulling off Ozzy's legendary look.
Our favorite part was Justin's "crazy" eyes during his performance. If that wasn't scary...
Watch Justin sing Ozzy's "Crazy Train" below.
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