Marie Ulven, the young Norwegian woman who records as girl in red, has been making queer alt-pop jams for about four years, and she’s just making her big push into the American pop consciousness now. Ulven released her full-length debut if i could make it go quiet last week. “Serotonin,” the album’s lead single and opening track, is produced by FINNEAS, Billie Eilish’s brother and collaborator, and it sounds about halfway between Twenty One Pilots and Clairo. Last night, Ulven sang it on The Tonight Show.