Kiss vocalist Paul Stanley stopped by 'The George Lopez Show' on Thursday night as a guest and also later performed two Kiss classics.

Lopez and Stanley are longtime friends and in fact, have collaborated on a painting together that is currently being auctioned for the benefit of tornado victims in the South and Midwest. You can bid on the auction which closes soon by going to this link.

The pair created the painting, which is autographed by both, during the show on Thursday.

Stanley initially performed 'Detroit Rock City' with the house band and later closed out the show with a performance of 'Rock and Roll All Nite' featuring 'American Idol' judge Randy Jackson on bass, Lopez on background vocals and DJ Russell Peters.

The members of Kiss are currently working on their next album, an album that Stanley says will "leave 'Sonic Boom' in the dust." The band will be back on the road for another round of touring this summer.

Watch Paul Stanley, Randy Jackson and George Lopez perform 'Rock and Roll All Nite.'