I wrote Sour when I was 17, and I wrote most of Guts when I was 19 and 20, and those few years are probably some of the most formative in your life. I grew so much just as a person, as a young woman, entering young adulthood.

Olivia Rodrigo's new film all but confirms that Sour was inspired by her breakup with Joshua Bassett when she said she was forced to see the person who broke her heart every day after the split.

Obviously, I'm obsessed with pop and pop artists. So I'm going to try and take all of my sort of influences ... and make something that I like. Rodrigo wrote the album's lyrics to explore a variety of "sour" emotions that young women "are often shamed for", including anger, jealousy, and sadness.