Sour (stylized in all caps) is the debut studio album by American singer-songwriter Olivia Rodrigo, released on May 21, 2021, via Geffen Records. Rodrigo stated that the album explores her perils and discoveries as a 17-year-old, with its title referring to the uncomfortable "sour" emotions youngsters experience but are often shamed for, such as anger, jealousy and heartache. The musical style of Sour was inspired by Rodrigo's favorite genres and singer-songwriters. Written and produced by Rodrigo and Daniel Nigro alongside few other collaborators, Sour is primarily an alt pop record that juxtaposes upbeat alternative rock and pop-punk songs aside bedroom pop ballads, driven by guitars, piano and synths. Its subject matter deals with topics centered on adolescence, failed romance and heartache told from Rodrigo's various perspectives. Sour received universal acclaim from music critics, who regarded it a solid debut, and praised Rodrigo's musical versatility, honest lyricism, and Gen Z appeal. Three singles preceded Sour's release: Rodrigo's debut single and the album's lead single, "Drivers License", achieved global success and acclaim, debuted atop the US Billboard Hot 100, and …