"Rock Bottom" is a song by American actress and singer Hailee Steinfeld featuring American funk pop band DNCE. It was released on March 1, 2016, through Republic Records and Universal Music Group, as the second single from her debut extended play (EP), Haiz (2015). The song was written by Mattias Larsson, Robin Fredriksson, Julia Michaels, and Justin Tranter, with production being handled by Larsson and Fredriksson under their stage name Mattman & Robin.

In an interview with People's Jeff Nelson, Steinfeld said "[Rock Bottom] epitomizes me in every damn relationship. I've experienced that relationship in its entirety. I do feel like there are some songs that really represent a relationship for a relationship, and then when you hear it, you think about that specific relationship, and I have that when I hear 'Rock Bottom'."

Access Hollywood deemed the song "a stylistic, upbeat jam full of swagger and soul." Jeff Nelson of People said "a poppy, effervescent jam, 'Rock Bottom' chronicles the highs and lows of young love that keep a couple 'coming back for more'." Mike Wass of Idolator called "Rock Bottom" "the best song on the EP."

In the weeks prior to Haiz's release, "Hell Nos and Headphones" was being touted as the EP's second single, but "You're Such A" was chosen instead, and was set to impact Top 40 radio on February 9, 2016. However, the release of "You're Such A" was scrapped in favor of the new version of "Rock Bottom" featuring DNCE.

The music video for the song, directed by Malia James, was released on March 25, 2016.Rolling Stone's Brittany Spanos described the music video: "In the clip, Steinfeld struggles with a tumultuous relationship. The singer and her boyfriend, played by model John Economou, shift dramatically between fighting and joking around, which culminates at a show Steinfeld performs at with DNCE. Economou walks out during the performance, and a distraught Steinfeld leaves to find him, where they kiss and make up."

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