“Lost Cause” is the fourth single off of Billie Eilish’s sophomore album Happier Than Ever. The song was released on June 2, 2021, along with its accompanying music video. Billie announced the song’s release date on June 1, 2021 after fans predicted the next song title when Eilish posted a selfie on her Instagram account with the caption “nothing but a lost cause”.

The song was preceded by “Your Power”, “Therefore I Am”, and “my future”.