Morrison's Will Schuester will sing "Still Got Tonight," from an empty theatre stage as part of the New York City-based episode. The ballad, which is the lead single from Morrison's self-titled album, was originally going to include a big dance number, but creator Ryan Murphy decided to have Morrison sing it alone instead.
"It's about aspiration," Murphy said. "It worked because we wanted to do a scene where Matt goes into a Broadway hall and sings something alone... We worked really hard to make it feel organic to the show."
Morrison's album hits stores Tuesday. Glee's Season 2 finale airs Tuesday, May 24 at 8/7c on Fox.