MTV News previews what fans will see when the Fox show returns on November 7.

The "Glee" cast will ask the age-old question on November 7: "A Katy or a Gaga?" The Fox sitcom is slated to return from hiatus next month (after the baseball playoffs) and they are doing it with a lot of spectacle and costumes.

In first-look stills from the episode, which will pay tribute to both pop princesses, the Gleeks are rocking their best Gaga and Katy attire, which include homages to Perry's jungle-themed "Roar" video as well as Gaga's more avant garde "Applause" visual. From the looks of it, the fellas aren't afraid to get into drag.

"American Idol" alum Adam Lambert will also appear on the episode, the first since the emotional Cory Monteith tribute, which aired earlier this month.. Is he belting out a Gaga or a Katy hit?

The promo shows us that Lambert will be putting his own theatrical, hanging-from-a-chandelier spin on Gaga's Born This Way jam, "Marry the Night." Lambert's character is expected to be auditioning to join a band with Kurt (Chris Colfer), Rachel (Lea Michele) and Santana (Naya Rivera) and Dani (Demi Lovato), out in New York City.

This is not the first time that the show has put the focus of an episode on the Mother Monster. In 2010, the show paid tribute to the pop star with covers of "Bad Romance" and "Poker Face."

"The guys do their thing," Kevin McHale shared with MTV News about having to don Gaga-themed attire in the 2010 episode. "Not all the guys can pull off Gaga."

When the "Glee" club wraps up with Gaga and Katy, they come out with "The End of Twerk," the title of November 14's episode. No word on how the show will fit twerking into the plot.