"Nightmare" was originally released in 2019, and earlier this month Halsey shared the extended edition of last year's If I Can't Have Love, I Want Power album, which featured "Nightmare" and "Nightmare (Reprise)".

Over the weekend Halsey shared a new TikTok video which shows her playing the "OG" version of "Nightmare". The clip features a sample of t.A.T.u.'s 2002 hit "All The Things She Said". Halsey captioned the video, "should I leak this version?"

@halsey should I leak this version? #tatu original sound - Halsey

Just before Christmas, Halsey surprise-released the accompanying Colin Tilley-directed film for her latest album.

Halsey's If I Can't Have Love, I Want Power (Extended) version is out now.