VIDEO: First Look - Adam Lambert Guests on Next GLEE!

It's Glambert, Gaga and Katy when Glee returns with an all-new episode THU 9/8c NOV 7. In the episode titled 'A Katy Or A Gaga', rocker Adam Lambert stars as Kurt Hummel's nemesis. Get a first look below!

Lambert will appear in his first guest starring role on the FOX musical drama as an audtioner for Kurt's Madonna cover band, 'Starchild.' He will perform a cover of Lady Gaga's "Marry the Night." Other songs to reportedly appear in the episode include Gaga's "Applause" and Katy Perry's "Roar."

The cast took a breather after filming the emotional tribute episode the late Cory Monteith. The episode, titled 'The Quarterback,' aired last night.