15-Year-Old Singer Shocks 'American Idol' With Bluesy Motley Crue Cover

American Idol is getting a dose of rock-n-roll. 

Casey Bishop amazed the judges during the second week of auditions with her a cappella rendition of Motley Crue’s "Live Wire." 

The 15-year-old claims she is a tried and true rock fan and her performance won over all three judges.