American Idol judge, Steven Tyler, jumped across genres to perform "Undo It" and "Walk This Way" with American Idol alum, Carrie Underwood at the ACM awards.
Check out more about the ACM Awards
Annie Howard (@CitadelNow) for Citadel Digital © 2011
Copyright © 2013 CUMULUS MEDIA and MediaSpan
Part of the MediaSpan NetworkPrivacy Policies: CUMULUS MEDIA | MediaSpan