Lyricist Glenn Slater has acknowledged that the rap-battle song "I Don't Like You" was inspired by the 2015 Broadway musical "Hamilton." In two seasons, it's the only song which Slater laid down the vocals for in the original demo track.
There was a brief on-set scare when Robert Lindsay attempted to blow out one of the flaming chalices and it quite literally backfired in his face. Lindsay was unharmed, and after a few seconds of tension various cast and crew members burst into laughter. Footage of this incident first surfaced on Twitter.
The song "Finally" is an allusion to two 'Grease' songs: "Summer Nights" and "You're the One That I Want."