Sometimes Jimmy Fallon joins the Roots, who are The Tonight Show‘s house band, for a song performed on classroom instruments with famous guests. In 2019, Pete Townsend and Roger Daltrey teamed up with them for an idiosyncratic performance of “Won’t Get Fooled Again.” Last night, Fallon and the Roots linked up with original Ghostbusters Bill Murray and Ernie Hudson as well as singer Ray Parker Jr. for his classic “Ghostbusters.”