Rebel Wilson and Jimmy's doppelgänger, "Fallonia," sing about how good a single life can be. On Friday’s edition of The Tonight Show, the How to be Single star and “Fallonia” (a.k.a. Fallon in a black dress and long brown wig) rapped about all the great things about singledom, like not having to share meals at dinner, liking Justin Bieber’s Instagram posts without feeling guilty, and having an easier time filing your taxes.

Jimmy plays an oddly convincing girl appearance-wise. They also took turns guessing random names and phrases while wearing noise-canceling headphones.

Wilson has an upcoming romantic comedy film based on the novel of the same name by Liz Tuccillo. The movie also stars Dakota Johnson, Alison Brie, Leslie Mann, Lily Collins, Damon Wayans, Jr., Nicholas Braun, Jason Mantzoukas, Colin Jost, Jake Lacy, Anders Holm, Nick Bateman and Imran Khan.

The film is scheduled for a Feb. 12 release by Warner Bros. Pictures, New Line Cinema and Metro-Goldwyn-Mayer.

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Jimmy Fallon, Rebel wilson, Justin Bieber, Dakota johnson, Alison Brie, Lily collins, Colin Jost