Lady Gaga and Katy Perry are both releasing new studio albums this fall, and Glee season 5 is capitalizing on it by doing an episode that focuses on the rivalry between each artist’s fans.

Glee season 5, episode 4 is titled “A Katy or A Gaga” and will also feature the introduction of pop star Adam Lambert’s new character who we told you about last month.

So far there are four songs set for this sure to be interesting episode. They are:

- Katy Perry’s “Roar” sung by Unique, Jake, Sam, Marley, Tina, Artie, Ryder, Kitty, Blaine, Kurt, Rachel, Santana, Dani (Demi Lovato) and Starchild (Adam Lambert).

- Lady Gaga’s “Applause” sung by Sam, Marley, Artie, Blaine & Ryder

- Katy Perry’s “Wide Awake” sung by Tina, Unique, Jake and Kitty

- Lady Gaga’s “Marry The Night” sung by Starchild (Lambert)

Fans of both major pop ladies have been having a friendly (?) competition over the past few weeks as Gaga and Perry prepare to release ARTPOP and PRISM. So far each singer has released one single, though Gaga performed several of her new songs live at the iTunes Festival on September 1 and Perry dropped a second song titled “Dark Horse” earlier this week.

This episode of Glee will be the first one after their Cory Monteith/Finn Hudson tribute episode titled “The Quarterback” and scheduled to air on October 10. Cast members have indicated that they would be taking a break after filming Cory’s episode, so it’s not clear when episode 4 will be airing.

Glee season 5 premieres this Thursday, September 26 on Fox.

Thanks to Gleek Out Brazil for the info.

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