"Killah" is a song by American singer and songwriter Lady Gaga featuring French musician Gesaffelstein, included in her studio album Mayhem (2025).
[2][3] The song encompasses electro-funk, industrial, and dance genres and has been compared to the sound of David Bowie,[4] Nine Inch Nails and Prince due to its use of dense synthesizers, heavy bass, and aggressive electronic rhythms.
[5][6][7] Structurally, the track builds on what some media outlets have described as "a hypnotic groove," with whispered verses that gradually intensify until culminating in a high-energy chorus.
[8][9] Various reviews noted that Gesaffelstein's production influence becomes particularly evident in the second half of the song, where the instrumentation breaks into a distorted techno interlude before returning to the chorus with greater impact.
"[12] AllMusic's Neil Z. Yeung highlighted the track as one of the album's best moments, describing it as "a collaboration with Gesaffelstein that blends Bowie and Prince's influence with the intensity of St. Vincent or Trent Reznor.
[15][16] Variety described the performance as "one of her most frenetic and immersive," while Rolling Stone praised her "overflowing intensity" and the funk style that made the song "feel like an instant classic.
"[16] AOL stated that the performance captured "the chaotic and theatrical spirit" of the album, solidifying the song as "a fan favorite just days after its release.