Tim McGraw told Ellen DeGeneres he wasn't wearing her underwear...or any at all!  He told Ellen, "These pants are too tight to have underwear on." As the audience laughed, Tim added, "Now I'm really embarrassing my daughters." Ellen presented Tim with a basket of briefs later in the show.

He also pranked a stagehand who was just supposed to tune Tim‘s guitar, but had to sit through some uncomfortable moments.