Sad13 (pronounced “sad thirteen”) is the side project by Speedy Ortiz’s lead vocalist and lyricist, Sadie Dupuis.

The project’s roots started when Dupuis met rapper Lizzo while on tour with Speedy Ortiz; a fan of Lizzo’s music, Dupuis collaborated with her on “Basement Queens,” a song about women making music on their own that became Sad13’s debut single in January 2016. Inspired, Dupuis wrote and recorded more Sad13 songs early that year in a Philadelphia bedroom she sublet from a friend. The results became the full-length debut Slugger, which Carpark released in November 2016.