A video loop of the song's chorus has been watched over 40 million times and doesn't feature 21 Savage.
Post Malone and 21 Savage's "rockstar" is the fifth hip-hop number one of 2017.
The 21 Savage-featuring track is a breakout hit.
Post Malone's new single shattered the single week streaming record previously held by DJ Khaled.
The track is allegedly off his upcoming album Beerbongs and Bentleys.
The song, co-written by Tove Lo, will be Lorde's next single from Melodrama.
The new remix drops September 14.
The August 27 event will also include performances from Julia Michaels and Logic.
Stream the soundtrack album for The Fate of the Furious.
Post Malone explains how Kanye West records in the studio and how he ended up on "Fade."
Post Malone confirms Stoney album will feature Justin Bieber, Kehlani, 2 Chainz, Migos, and will be released on December 9