2024–present: Collaborations and Baby
In February 2024, Mk.gee released his debut studio album Two Star & the Dream Police, featuring production and songwriting by Duenas. Later that month, Duenas featured on "Aphid", the debut single by former Brockhampton member and Duenas' frequent collaborator Matt Champion, and the lead single from his first album Mika's Laundry. Duenas contributed heavily to the album, appearing as a songwriter and producer on seven tracks, including the single "Slow Motion", performed by Champion and Blackpink member Jennie. In October, Duenas contributed production and songwriting to Champion's single "Faye", from his first EP Slint's Favorite.
In April 2025, Duenas appeared as a featured artist on "Day One", from Bon Iver's fifth album Sable, Fable. That July, he produced and co-wrote several tracks on Justin Bieber's seventh album Swag, appearing as a performer on "Devotion" and a producer and songwriter on three other tracks, including "Daisies" and "Yukon", which peaked at numbers two and seventeen, respectively, on the Billboard Hot 100.
On August 8, Duenas announced his second album, Baby. The album was given a tentative release date one week later, dependent on sample clearance. Baby was released on schedule on August 15, and received critical acclaim from publications including Clash, NME, Pitchfork, and Rolling Stone. Three days after the album's release, Duenas announced a tour of North America and Europe.
On September 5, Bieber released his eighth studio album, Swag II, again featuring production and songwriting from Duenas, including on the lead single "Love Song". Later that month, Duenas made his acting debut in Paul Thomas Anderson's film One Battle After Another, appearing alongside fellow musicians Teyana Taylor, Alana Haim, and Junglepussy.