Olivia Rodrigo’s debut, SOUR, is the sound of a life spent listening to and absorbing high-grade pop music. “good 4 u” and “1 step forward, 3 steps back” nod directly to Paramore and Taylor Swift, respectively, but other influences are apparent as well. The ghostly harmonies on “favorite crime” recall Lorde’s witchy backing choirs, while the guitar crunch of “brutal” harks back to Britpop faves Elastica.