"Like I'm Gonna Lose You" is a song by the American singer-songwriter Meghan Trainor from her debut major-label studio album Title (2015), featuring guest vocals from John Legend.

In the United States, "Like I'm Gonna Lose You" reached number eight on the Billboard Hot 100 and was certified 4× Platinum by the Recording Industry Association of America.

Constellation Jones directed the music video for "Like I'm Gonna Lose You", featuring Trainor singing in a candlelit room on a rainy night while people engaged in a diverse variety of relationships are shown interacting with their loved ones.

[3] While working in Music Row, Trainor met fellow songwriters Justin Weaver and Caitlyn Smith, and wrote "Like I'm Gonna Lose You" with them, intending to pitch it to Kelly Clarkson.

[16] Epic Records promoted "Like I'm Gonna Lose You" to contemporary hit radio stations in the United States on June 23, 2015, as the fourth single from the album.

[26][27] Trainor stated she wrote it after having one of "those nightmares that your brother or sister or boyfriend just dies", after which, one is relieved to find them still alive: "It's like I'm going to love you like I'm going to lose you because I know what it feels like from that dream and I'm not going to let it happen".

[14][20] Music critics including Gittins and Newsday's Glenn Gamboa thought "Like I'm Gonna Lose You" sounded like a "classic"; the latter commented that it will serve Trainor throughout her career.

[20][32] Writing for New York Daily News, Jim Farber thought the seriousness of "Like I'm Gonna Lose You" did not befit Trainor, noting that it only flattered Legend.

[33] Marc Hirsh of The Boston Globe wrote that Trainor struggled when attempting to stray from her usual pastiche music, and failed to project personality on the song while Legend "[came] through loud and clear".

[59] Constellation Jones directed the music video for "Like I'm Gonna Lose You", which premiered on Vevo and was simultaneously promoted through a billboard in Times Square on July 9, 2015.

[22][30][60] In it, Trainor performs the song in a candlelit room on a rainy night while people engaged in a variety of relationships are shown interacting with their loved ones: a mother and daughter, grandmother and granddaughter, heterosexual, homosexual and interracial romantic couples, and friends.

[10][61][62] In a behind-the-scenes video released on July 21, Trainor described its message as "loving someone as if you're gonna lose them", and noted that its emotional nature represented a change of pace from the "bubblegum 'pop star'" role she was used to portraying.

[30][63] Critics praised the video's heartwarming character; Benjamin opined that its depiction of different "people, races and sexualities" would help "Like I'm Gonna Lose You" connect with varied audiences.

[73] Trainor and Legend performed an a cappella rendition of "Like I'm Gonna Lose You" for Pop TV's "Massive Musical Mash-Up", which Entertainment Weekly published on May 27.

; she did not struggle and was steady while singing its towering notes according to Entertainment Weekly's Jessica Goodman, which led Billboard to comment that she displayed no ill-effects from her vocal cord hemorrhage the previous month.

[77] Trainor performed "Like I'm Gonna Lose You" at the American Music Awards on November 22, 2015, in a medley with "Marvin Gaye" (2015), accompanied by Charlie Puth for the latter.

[78] American girl group Fifth Harmony sang an acoustic guitar-driven cover of the song at the 2016 Billboard Women in Music ceremony, which Trainor could not attend due to being put on vocal rest.