"Bloody Mary" is a song by American recording artist Lady Gaga from her second studio album, Born This Way (2011).
The song was written by Gaga, Fernando Garibay, and DJ White Shadow, while produced by herself and DJ White Shadow, with additional co-production by Garibay and Clinton Sparks. It is an electropop song with elements of synth-pop and trance, featuring Gregorian chants. In its lyrics, Gaga assumes the role of Mary Magdalene, whom she found a "feminine force" she had worshipped since her childhood in a Catholic girl school. It is one of several tracks on the album with Biblical references.
Critical reception towards "Bloody Mary" was generally positive, with reviewers branding it "gothic" and "spooky", and highlighting its productional values.
In 2022, following the release of the Netflix comedy horror series Wednesday, the titular character's dance and its fan recreations to the song went viral on video sharing service TikTok. This resulted in a large increase in plays of the song on Spotify and in December 2022, "Bloody Mary" was sent to US Pop Radio as an official single, 11 years after the release of the album that featured it.
The song was performed on Gaga's concert tours the Born This Way Ball (2012–2013) and the Joanne World Tour (2017–2018). English rock band the Horrors' take on "Bloody Mary" was included on Gaga's second remix album, Born This Way: The Remix (2011).