His third album To Pimp a Butterfly (2015) incorporated elements of funk, soul, jazz, and spoken word. It became his first number one album on the Billboard 200, and was the most acclaimed album of the 2010s, according to statistics from Metacritic.[4] It was followed by Untitled Unmastered (2016), a collection of unreleased demos that originated during the recording sessions for To Pimp a Butterfly. He released his fourth album, Damn (2017) to further acclaim; its lead single "Humble" topped the US Billboard Hot 100, while the album became the first non-classical and non-jazz album to be awarded the Pulitzer Prize for Music.[5] In 2018, he wrote and produced 14 songs for the soundtrack to the superhero film Black Panther, which also received critical acclaim.