Friends on and off stage, Brad Paisley and Keith Urban took home the award for Collaborative Video of the Year for their hit single, 'Start a Band'.

"Brad called me up and he said he had a song he wanted me to play on," Keith said." I said absolutely. It was a blast."

"First of all, Martina is shorter than I thought," Brad joked of his labelmate Martina McBride. "What an honor to work with this guy (Keith). I think the world of you, and everybody here does, too."

"Learn guitar kids," Brad advised, joking, "Rock Band never got anybody a date."

Martina got back at Brad later in the night, as she presented an award with actor Luke Wilson. She told the crowd she was happy to be presenting with someone taller than her and not with a shortie like Brad.

Read the story behind 'Start a Band' here.