Zac Brown BandThe Zac Brown Band are not at the ACM Awards in person, but they're certainly there in true American spirit. The country-rockers are on a USO tour overseas, but they didn't want to give up their ACM performance slot ... Instead, they sent in concert footage from the Middle East.

"I'm gonna tell y'all what we tell the crowd every night when we play back in the states. We tell them to remember people sleeping in a sandstorm so that we can be free," Zac told an audience packed with troops, during a concert taped in a secret, undisclosed location.

This is the third USO tour for Zac and the boys, who are up for four ACM Awards, including Entertainer of the Year.