Access Hollywood asked Keith Urban about the rivalry with Blake Shelton. Both big stars, both sing with Miranda and both judge on wildly popular tv shows!

Keith says since Blake is bigger than he is, he'd hire someone to kick Blake's butt. Not one to back down, Blake says it's a good thing Keith is hiring someone -- otherwise, "he would get tangled up in his own hair.” But Blake says he has to call a truce since Miranda and Keith's duet, "We Were Us," is climbing up the charts.