"Friend or Foe" is a song by Russian recording duo t.A.T.u., taken from the group's second English language studio album Dangerous and Moving (2005).

[5] The same month, Interscope Records announced that they would issue a 12-inch vinyl CD in the United States, only containing remixes of the single.

Michael Boyles from The Pitt News gave it a positive review, saying that alone with "Loves Me Not"; " stand out as the most sexually ambiguous of this type and are two of the best tracks on the album [...]"[8] Michael Freedburg from The Boston Phoenix said along with "Perfect Enemy", "Dangerous and Moving" and "All About Us"; "shoot straight to the gut – and to the heart.

The song then managed to peak inside the top forty in countries including the Czech Republic, Italy and the Wallonia region of Belgium.

In the United Kingdom, the song spent a sole week on the UK singles chart at forty-eight.

shot their video in the Los Angeles suburbs, directed by James Cox and produced by Billy Parks.

The video was shot at Bronson Caves (where the original Batman TV series was filmed) in Hollywood by 1171 Production Group.

Yulia snaps her fingers and music begins to play as the girls perform in front of a mosh pit for a crowd of fans, who all dance and move to the song.