Singular: Act I is the third studio album by Sabrina Carpenter. It was released on November 9, 2018, through Hollywood Records. Carpenter began work on the album shortly after the release of her second studio album, Evolution (2016). The dance-pop album is themed around self-empowerment and marked the first time where all songs on an album were co-written by Carpenter. In support of the album, Carpenter embarked on the Singular Tour in March 2019.

Two singles were released for the album including "Almost Love" and "Sue Me" while "Paris" and "Bad Time" were released as promotional singles. Additionally, singles "Why" and "Alien" were not on the album's tracklist but were instead included on the Japanese edition of the album. The album received critical acclaim from music critics, and debuted at number 103 on the US Billboard 200. The album itself is the first half of a two-piece project, being supplemented by Singular: Act II (2019).