On the recent "Pot 'O Gold" episode, Darren Criss performed a cover of Perry's latest single, which was staged as a choir room musical number. Shankman talks about taking on "Last Friday Night," which features the upcoming How to Succeed… performer in his first McKinley choir room solo.

On the next episode, "The First Time," according to Fox, "the kids prepare to perform the school musical West Side Story. Meanwhile, Finn (Cory Monteith) meets with a recruiter, and Coach Bieste (Dot-Marie Jones) has an admirer." The episode is scheduled to air on Fox Nov. 8.

As previously reported, Grant Gustin (West Side Story national tour) will make his "Glee" debut as Sebastian, a gay student at Dalton Academy who will come between Kurt and Blaine. Sebastian is described as the male version of Santana (Naya Rivera) and this season's villain.

Also on the upcoming episode, as McKinley High prepares to put on the Leonard Bernstein-Stephen Sondheim-Arthur Laurents classic West Side Story, the students will perform covers of "America" and "A Boy Like That."

"Glee" airs Tuesday nights on Fox at 8 PM ET. To watch the behind-the-scenes action with Shankman, look below: