"She's My Ex" is a song by the American punk rock band All, released as a single from their 1989 album Allroy's Revenge.

Written by drummer Bill Stevenson, the song describes an ex-girlfriend with whom he had a tumultuous romance.

", written by bassist Karl Alvarez, is from the Allroy's Revenge recording sessions but was not included on the album.

Several of Stevenson's songs on Allroy's Revenge describe a tumultuous romance, including "Scary Sad", "She's My Ex", and "Net".

[3] Several performers sang backing vocals on the track, including Milo Aukerman of All's precursor band the Descendents.