Artists are constantly getting hit up with hair-brained schemes from fans who want this or that favor. DIERKS BENTLEY actually went for this one. He let some dude propose to his girlfriend on HIS tour bus as Dierks sang "My Last Name". There's a part toward the end of the song where the singer asks his lady to take his last name. When Dierks hit that mark in the song, the guy pulled out the ring.
Dierks actually lets the guy sing too, and he doesn't have that bad of a voice. If you're interested, he goes for the ring at the 3:39 mark of the video.