lover's habits of drinking and partying too often. The lyrics address alcoholism. Tamposi explained that "It Ain't Me" is about a woman finding the strength to walk away from a toxic relationship despite the pressure she receives from society to stand by her man. Although the lyrics are sombre, the song has a distinctly uplifting and empowering sound. In Vietnam, the song "LayLaLay" composed by singer Jack was plagiarized from "It Ain't Me". Release In early February 2017, "It Ain't Me" was registered on the American Society of Composers, Authors and Publishers (ASCAP) database. Gomez first teased the single with two Instagram stories on 3 February 2017. The first teaser showed a half-profile of the singer with a black "X" over her mouth as a 10-second snippet plays with the lyrics, "I had a dream / we were back to 17 / summer nights and The Libertines / never growing up," while the second teaser was a snippet of the song's beat. Gomez later revealed the single's cover art and release date on Instagram on 13 February 2017, and shared three teasers of the song on Snapchat the following day. "It Ain't Me" was released for digital download by Interscope, Sony and Ultra Music on 17 February 2017 as the first single from Kygo's upcoming second studio album. Interscope was the primary label since it is Gomez's label. A remix of the song featuring actor Vin Diesel was released on Facebook on 18 February 2017. "It Ain't Me" was sent to contemporary hit radio in the US on 28 February 2017. Critical reception "It Ain't Me" received positive reviews from music critics. Matt Medved of Billboard regarded it as one of Gomez's most mature-sounding releases and appreciated Kygo's usage of her vocals, adding that the song showed both collaborators' "best sides". Similarly, Alexia Hernandez of Entertainment Weekly deemed it "perhaps her most mature tune to date". In The New York Times, Jon Pareles described the song as a "righteous kiss-off", commending its subtle and varied production. Pedro Pincay of Vibe magazine said Kygo and Gomez "cooked up something special". Kat Bein of Billboard ranked "It Ain't Me" atop her list of ten best Kygo songs, writing that Gomez's "powerful and strong" vocals took "Kygo's collaborative vocal game to a whole new level" and the chorus arrangement brought "a certain edginess new to Kygo's catalogue", concluding that the song showed growth