Dierks Bentley helps out Jack Ingram, singing Barbie Doll at the 2010 ACM Awards. I'm thinking Dierks was way too happy about being squeezed out of the limelight for about a minute when all the girls jumped on the stage! He finally makes his way back to the front with Jack. See for yourself:
Special thanks to Nid and dierksfans.com for the video capture!