Double-duty on “Saturday Night Live” — as the host and musical guest — is a double-edged sword. The people who are gifted at both, like Donald Glover and Ariana Grande in recent years, usually nail it,

Later in the sketch, SNL ‘s Bowen Yang, who famously impersonated Charli during the show’s Season 50 premiere, returns to play Charli once again — this time while standing next to Charli herself, who appears as her Sweat tour mate Troye Sivan.