Sour is the debut album by the American singer-songwriter Olivia Rodrigo. It was released on May 21, 2021, by Geffen Records. The album was written by Rodrigo and producer Dan Nigro. Originally planned as an EP, Sour was expanded into a full-length album following the viral success of her debut single, "Drivers License". No. 1 on the Billboard 200 for 1 week, from the issue of September 4, 2021. Wiki link