Brian Setzer collapsesRockabilly revivalist Brian Setzer collapsed during a concert at a New Mexico casino Monday night after fans say the guitarist appeared unsteady, KOB.com is reporting.

The Grammy winner was about two songs into his set when he walked off stage and collapsed. He was then rushed to a local hospital, but it's unclear which facility or whether he is still seeking treatment.

One concertgoer, Mike Anderson, told RadarOnline.com that the former Stray Cats frontman became visibly ill-looking 20 minutes into his show.