"Deja Vu" is a song by American rapper Post Malone featuring Canadian singer Justin Bieber.

The first collaboration between the two artists, they wrote the song alongside Matthew Tavares, Kaan Güneşberk, FKi 1st, Louis Bell, Carl Rosen, Julkeyz, & producers Frank Dukes and Vinylz.

Bieber immediately took to the beat and ended up recording his vocals, what would become the finished version of "Deja Vu" in the booth, with him and Malone going back and forth with ideas.

In particular, The Fader's David Renshaw said it "has an almost 'Hotline Bling'-esque tempo", while Madeline Roth of MTV News, Danny Schwartz of HotNewHipHop, and Billboard's Colin Stutz noted similarities between the two with the song's start.

[5][7][8][10] In a different comparison, Dana Getz of Entertainment Weekly wrote that it "features a slow fizz, cha-cha inflected beat akin to a drowsier take on Drake's 'One Dance'".