SOS is the second studio album by American singer-songwriter SZA. The album was released on December 9, 2022, through Top Dawg Entertainment and RCA Records. It features guest appearances from Don Toliver, Phoebe Bridgers, Travis Scott, and Ol' Dirty Bastard. SOS was supported by three singles—"Good Days", "I Hate U", and "Shirt"—two of which peaked within the top ten of the Billboard Hot 100. "Good Days" peaked at number nine, "I Hate U" at number seven, and "Shirt" at number eleven on the chart. Background A follow-up album to her debut Ctrl was first confirmed in January 2020. In an interview with Rolling Stone, SZA mentioned that "Music is coming out for sure", but stating that it may not result in an album, as of yet. She also said that the rumor that she was planning to release a trilogy of albums and then retire from music, "is nonsense". In the interview, SZA also revealed that she had spent time in the studio with Timbaland, stating that "He played fucking Brazilian jazz-type beats, and I popped off to that". She has also collaborated with Sia, who she reportedly has written three songs with. According to Vulture, SZA has earlier expressed intentions of collaborating with Justin Timberlake, Post Malone, Jack Antonoff and Brockhampton on her future songs. On April 3, 2022, she was asked about the album in an interview with Variety. She claimed that she had just finished it up in Hawaii and that it was coming soon. She also described the project as her "most unisex album yet". On May 2, 2022, while at the Met Gala, SZA revealed to Vogue that the album was slated for release in summer, calling it a "SZA Summer". In October 2022, she announced that the album could be released "any day now". Composition The album consists of twenty-three tracks written and composed by the singer herself, with the participation of writers and producers, including Babyface, Jeff Bhasker, Benny Blanco, Rodney Jerkins, DJ Dahi, Gabriel Hardeman, Ant Clemons, Lizzo and Björk. The album features collaborations with Don Toliver, Phoebe Bridgers, Travis Scott, and Ol' Dirty Bastard. Musically, the album is contemporary R&B-inspired, with influences from hip hop and pop. The album samples sound references from soul, gospel, jazz and melodic rap. The sound of the album was described as "a varied palette", combining "surf rock" and "grunge" elements, alongside "her beloved lo-fi beats".