"30 for 30" is a song by singer-songwriter SZA and rapper Kendrick Lamar. It was released as a single from SZA's first reissue album, Lana (2024), on January 7, 2025. The song was written by both SZA and Lamar, along with Bobby DeBarge, Greg Williams, Anthony Jermaine White, and Michael Uzowuru while production was handled by the latter two. Critics noted that while Kendrick Lamar often adopts a softer tone in their collaborations, SZA delivers a more confident rap-singing performance here. It arrived a month after their previous two collaborations for Lamar's GNX, "Luther" and "Gloria".