Coming off their emotional Cory Monteith tribute, the next episode of Glee will pit the characters’ love for Lady Gaga against Katy Perry and feature guest star Adam Lambert.

Watch the promo video for Glee season 5, episode 4 “A Katy Or A Gaga” below in which we get our first look at Lambert in his role (pictured above) and a glimpse into Demi Lovato’s continuing recurring role as Santana’s love interest:

The preview used Lambert’s Glee cover of “Marry the Night,” originally performed by Lady Gaga to open the Born This Way album. Other songs in this episode will include Gaga’s “Applause” and Katy Perry’s “Roar.” When the songs hit the internet we’ll be sure to share them with you.

On Glee, Lambert’s character’s stage name is Starchild and auditions for Kurt’s Madonna cover band that he spoke about in episode 2.

Notably, this new episode of Glee will not be airing this Thursday. Season 5, episode 4 will air Thursday, November 7. The reason for this hiatus is two-fold: Fox needs the Glee time slot for baseball playoffs, and the cast took a little time off after filming their Cory/Finn tribute to regroup and think about the direction of the show going forward.

The episode’s theme will be timely as Perry is releasing her new studio album PRISM on October 22 and Lady Gaga’s ARTPOP drops shortly after on November 11. Both are prepping new singles for fans.

Looking beyond episode 4, we already know the songs that the Glee kids will perform in episodes 5 and 6. Selections include work from Robin Thicke, Miley Cyrus, and a Billy Joel tribute episode.