Ed Sheeran (“Perfect”), Katy Perry (“Teenage Dream”), Maroon 5 (“Moves Like Jagger”), Rihanna (“Diamonds”), Justin Bieber (“Love Yourself”)—15 No. 1s by the time he turned 25. One word that comes to mind in the course of reviewing benny blanco’s songwriting resume is insane. It’s not just how fluidly he moves between genres, but how playful he is—even on ballads, blanco manages a sense of childlike lightness that makes even heavy stuff feel bearable. This is pop in all caps: Top down, supersaturated, so bright it dares you not to smile.