Supporting his talented girlfriend, John Mayer accompanied Katy Perry to the "Saturday Night Live" after-party at Heartland in New York City (October 13).

The "Roar" singer wore a black, white, and gray mini dress with black nylons and a mesh black jacket as she headed inside with her musician beau.

As previously reported by GossipCenter, the 28-year-old pop star debuted a new song while performing that night.

Off of her upcoming album Prism which hits stores on October 22nd, Katy belted out the electronic dance tune, "Walking on Air."