"OMG What's Happening" is a song by American singer Ava Max, released on September 3, 2020, through Atlantic Records, as the third single from her debut studio album, Heaven & Hell (2020).

The disco-funk and disco-pop song was written by Max, Roland Spreckley, Henri Antero Salonen, Sorana Păcurar, Cirkut and Jason Gill, and produced by the latter two writers alongside Hank Solo.

[3] "OMG What's Happening" was written by Max, Roland Spreckley, Henri Antero Salonen, Sorana Pacurar, with producers Cirkut and Jason Gill.

[9] "OMG What's Happening" utilizes vibey hooks and a spoken-word bridge,[10] while Max performed high-wire vocal undulations compared to Marina Diamandis.

[12] Writing for Us Weekly, Nicholas Hautman stated that it was "disco realness",[13] while Honke wrote that the song resembled a "disco-like atmosphere" from the late 1970s.