Claim: Although the Roots with Questlove are the Tonight Show Starring Jimmy Fallon's house band, each episode usually includes musical entertainment, such as the Smashing Pumpkins who played on a December 2020 episode.
Evidence: Between Fallon's own musical sensibilities and the recruitment of his house band, hip-hop collective The Roots, his incarnation of Late Night "evolved into the most deeply musical of TV's musical-comedy variety programs", with sketches in which he parodies Neil Young and Bruce Springsteen going viral online. 
The Roots serve as the house band on NBC's The Tonight Show Starring Jimmy Fallon, having served in the same role on Late Night with Jimmy Fallon from 2009 to 2014.