If it looks like Glee and sound like Glee, it's probably an impromptu jam session between costars Matthew Morrison and a scruffy Darren Criss, performing "Summer Rain," the first single off of Morrison's debut album.

The two heartthrobs, who play Will Schuester and Blaine Anderson, respectively, on the hit FOX show, staged a skit in which the noise from Morrison's band interrupts Criss' meditation. How to make amends? Let Criss join the fun and pick up a guitar. Or, in his words, "I'll let it go that you disrupted nirvana if you let me play a song with you. How does that sound?"

After the guys belt out the single, Criss caves and admits, "I lied. I followed you here. I know all your songs, I'm like the biggest fan." Then they get down to singing a couple of old classic, Glee style. Morrison's self-titled album is being released today. —KIMBERLY STEELE

Watch the performance here:

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