Led by Mouse Rat frontman Chris Pratt, Amy Poehler, Aziz Ansari, Nick Offerman, Aubrey Plaza, Adam Scott, Retta, Jim O'Heir, Mike Schur and Jon Glaser ended the evening by singing a beloved Pawnee tune, "Bye, Bye Li'l Sebastian."
Holding up lighters during the singalong, Aubrey and Jim, a.k.a. April Ludgate and Jerry Gergich, started to simulate making out to the surprise of their co-stars.
The Parks and Rec castalso sat down with Seth to chat about how they thought the series should have ended. "I pitched that I would have sex with Joe Manganiello," Retta, who plays Donna Meagle on the NBC sitcom, joked (sorta).
Pratt, who portrays the lovable Andy Dwyer, apparently thought the audience should see how everyone died "like the Six Feet Under finale."