who wrote the song "irreplaceable"?
Shaffer "Ne-Yo" Smith, Tor Erik Hermansen, Mikkel, S. Eriksen, Espen Lind, Amund Bjørklund, Beyoncé
Irreplaceable
 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.
who sings the song to the left to the left Beyoncé
wiki:22305355
Irreplaceable [SEP] Introduction
"Irreplaceable" is a song recorded 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.