Love, reciprocated or unrequited, is one of pop music's most enduring subjects, but some of the best love songs ever written are breakup songs.
Breakup songs written for revenge, with toxic and radioactive material aimed at feckless exes, make for deliciously acid-tongued music.
Lily Allen's internet-breaking new album West End Girl, with its extremely-no-holds-barred lyrics, is widely understood to be about her marriage to David Harbour and its demise.
Author's summary: Breakup songs are a staple of pop music, with revenge-filled lyrics making for some of the best songs.