The Tonight Show Starring Jimmy Fallon Season 4 Leslie Mann, Jonathan Groff, Machine Gun Kelly, Camila Cabello Season 4, episode 42 Leslie Mann, Jonathan Groff, Machine Gun Kelly, Camila Cabello November 23, 2016 45 min Previous episode Sarah Jessica Parker, Scott Patterson, Liza Weil, Sean Gunn, Frank Pellegrino Jr. Next episode Kevin James, Tim Gunn, The Weeknd