An all new episode of Glee goes jungle for Katy Perry's Roar & Lady Gaga's Applause as cast mates welcome Adam Lambert and Demi Lovato and get semi nude in loincloths.

Producers of the show are pulling out all the stops as most of the male cast of Glee goes semi naked for a Lady Gaga and Katy Perry special.

The episode also sees the cast welcome American Idol star Adam Lambert and Demi Lovato.

Chord Overstreet looked pumped for his performance of Gaga's Applause...

Then when it was Katy Perry's hit Roar's moment in the spotlight, most of the cast stripped down to loincloths..

Jacob Artist's body looks incredible

Special guest Adam Lambert, lights up the screen with his smile, guesting on vocals for Roar along with Demi Lovato and the rest of the Glee cast.