The Tonight Show Starring Jimmy Fallon Season 4 Rob Lowe, Chrissy Metz, Fifth Harmony ft. Gucci Mane Season 4, episode 175 Rob Lowe, Chrissy Metz, Fifth Harmony ft. Gucci Mane July 24, 2017 45 min Previous episode Kevin Bacon, Jenna Dewan Tatum, Nate Bargatze Next episode Jessica Biel, Matt Bomer, Kelsea Ballerini