This one slipped under the radar.  KISS legend Paul Stanley performed last night on Lopez Tonight.  You hardly ever see Stanley perform without his makeup on, but he did last night.  Lucky for you and me, blabbermouth.net has videoSee video after the jump!

Paul is said to be a huge fan of George and performed two KISS classics — "Detroit Rock City" and "Rock And Roll And Nite" — on the program, with "American Idol" judge Randy Jackson on bass, Russell Peters DJing and Lopez on background vocals. Check out the footage below.

Here's Stanley's performance:

Stanley was also on the show to promote a painting that he and Lopez did together.

Proceeds go to the American Red Cross to benefit the tornado victims in the South and the Midwest. Click here to bid.