After Demi Lovato played Ariana Grande some songs from her then-forthcoming album in 2019, the latter began to write "Met Him Last Night" specifically with Lovato's story in mind; the former said: "She knew about the story behind it and everything, and she's a close friend of mine, so she knew my story pretty well".[3] Originally, Grande did not want to appear on the song herself, with Lovato later convincing her: "I was like 'I feel like the world would love to hear us together, like we should do that'".[4] She expressed her excitement about working with Grande in an interview with People.[5]
At the end of March 2021, Lovato revealed the featured artists for her seventh studio album, Dancing with the Devil... the Art of Starting Over, by posting snippets of the collaborations on her social media accounts, including the song with Grande.[6] In an interview with Paper Magazine, she confirmed the title of the track, "Met Him Last Night".[7] The singer also stated that it was a late addition to the album, having been recorded in the three weeks prior to its release.[8]
Lovato stated the song is "best representative" of a period in her life discussed in the documentary series Demi Lovato: Dancing with the Devil, which involves "the downfalls of recovery" and that "sometimes you slip up", presumably referencing a slip-up had after a "week-long intensive trauma retreat" due to calling up her drug dealer in hopes of trying to "rewrite his choice of violating me".[9][10] The song is a follow-up to Lovato's prior single "Dancing with the Devil", as "Met Him Last Night" features the "Devil" as the seductive title character and antagonist that Lovato and Grande sing about meeting up with.[11][12]
Following the release of Dancing with the Devil... the Art of Starting Over, "Met Him Last Night" was sent to contemporary hit radio in the United States on April 13, 2021, as the fourth and final single from the album.[13] To further promotion, a remix of the song produced by Dave Audé was released on May 12, 2021. It was later nominated at the 64th Annual Grammy Awards in the category of Best Remixed Recording, Non-Classical.[14]
"Met Him Last Night" was described by Billboard as "a dark, twisted fantasy about chilling with the devil and finding out that, well, he's kind of a funny, chill dude who might be relationship material", containing the lyrics "I've seen the devil, yeah, I met him last night/ One conversation, now he's spendin' the night," which an "urgent" Lovato sings "in a couplet that clearly has a much deeper meaning about flirting with disaster."[15]
Music critics labeled "Met Him Last Night" as the most anticipated track from Dancing with the Devil... the Art of Starting Over.[16][17] In reviews of the album, "Met Him Last Night" was referred to by NME as a "dark and atmospheric electro bop",[1] and Neil McCormick from The Daily Telegraph highlighted the song as not only "a flirty duet in which the seductive title character is the Devil" that "succeeds in both acknowledging the dangers of the high life and making fun of them at the same time," but that it reflects the way in which Lovato's album as an entirety pleasurably "succeeds in grappling with serious matters without jettisoning any of the lightness, melodiousness, nimble rhythms and sugar-high hooks of her pop genre."[18]
^Jenkins, Craig (April 2, 2021). "Demi Lovato's Redemption Arc Begins". Vulture. Retrieved April 6, 2021. "My Girlfriends Are My Boyfriend" and the Ariana Grande duet "Met Him Last Night" show a flair for contemporary R&B