Hot Pink was released on November 7, 2019 to generally favorable reviews. The album would eventually peak at number 9 on the Billboard 200. She later released the single "Boss Bitch" as part of the soundtrack for the 2020 film Birds of Prey.
In January 2020, "Say So" was sent to radio to become the fourth single off of Hot Pink. The song was originally released alongside the album in November 2019, but gained popularity afterward on TikTok. She performed the song on The Tonight Show Starring Jimmy Fallon in February 2020. She released the music video directed by Hannah Lux Davis for the song the next day. The solo version of "Say So" peaked at number five on the Hot 100, becoming her first top-ten single, and was the most streamed song of 2020 by a female artist in the United States. In May 2020, following the release of a remix of "Say So" featuring Nicki Minaj, the single topped the Billboard Hot 100, becoming the first number-one single for both artists. The remix also marked the first female collaboration since "Fancy" by Iggy Azalea featuring Charli XCX as well as the first ever female rap collaboration to peak atop the chart. Read more about Doja Cat here.