On this week's episode of Comedy Bang! Bang! (IFC, Friday, 10 pm), Community's Gillian Jacobs drops by for a visit—and like many of the other guests, gamely joins in for an episode of the completely improvised Reggie Makes Music. Unlike many of the other guests, Gillian is petrified about singing an improvised song, and yet? NAILS IT. Check out her adorable self, singing about puking. (And it's a pretty hot song!)