Returning to their roots of collaborating with more underground artists to make indie-influenced EDM-pop, “Up & Down” is the first single off of The Chainsmokers’ fifth studio album, featuring Canadian alt-pop star, 347aidan.

First teased without a title or featured artist attached on January 1, 2023, the song was first officially teased by The Chainsmokers during a video posted to their social media on January 25, 2023, revealing that the feature on the song was 347aidan. The duo continued to promote the single before releasing it on April 21, 2023.