"Sorry Not Sorry" is a song recorded by American singer Demi Lovato. She co-wrote the song with Sean Douglas, Trevor Brown, William Zaire Simmons and its producer Oak Felder. It was released on July 11, 2017, through Island Records, Republic Records, Hollywood Records, and Safehouse Records, as the first single from her upcoming sixth studio album.

On June 29, 2017, Lovato published a trio of pictures in her Instagram and Twitter account showing an acronym titled "SNS" causing speculation related to a possible new single. Five days after, the singer confirmed the release of a song via an Instagram video, and teased an instrumental of the track, the following day, Lovato posted a video on her Twitter revealing the title "Sorry Not Sorry". Lovato explained to Amazon Music that "Sorry Not Sorry" is a song for the "haters" with the message "you know what I'm good now and sorry I'm not sorry that you may not be loving where your life is at the moment."

Forbes contributor Hugh McIntyre described "Sorry Not Sorry" as "an unapologetic, braggadocious look in the mirror, with Lovato taking the opportunity to praise herself, and rightfully so," and further opined that "Lovato really packs a punch her powerful vocals, which have been setting her apart from other female pop stars for years now." Elias Leight of Rolling Stone described the song as a "gleeful revenge on a callous ex" with "heavy rhythmic effects." Christopher Rosa of Glamour felt the song "takes self-empowerment to new heights." Lars Brandle of Billboard wrote it was "bound to be embraced as a girl-power anthem." On a less positive note, Mike Wass from Idolator stated that its theme was something that had "been done several dozen times before," as the concept is a "fairly tired tale of turning the tables on an ex/hater," and felt the chorus "offers more of the same."

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