"Irreplaceable" is a song by American singer Beyoncé for her second studio album, B'Day (2006). The song was written by Shaffer "Ne-Yo" Smith, Tor Erik Hermansen, Mikkel S. Eriksen, Espen Lind, Amund Bjørklund, Beyoncé and produced by Stargate and Beyoncé. "Irreplaceable" was originally a country record; it was re-arranged as a mid-tempo ballad with pop and R&B influences by modifying the vocal arrangements and instrumentation. During the production and recording sessions, Beyoncé and Ne-Yo wanted to create a record which people of either gender could relate to. The song's lyrics are about the breakdown of a relationship with an unfaithful man and the song contains a message about female empowerment.

Beyoncé Giselle Knowles-Carter is an American singer, songwriter and businesswoman. Dubbed as "Queen Bey", she is regarded as a prominent cultural figure of the 21st century and has been recognized for her artistry and performances, with Rolling Stone naming her one of the greatest vocalists of all time.