It was written by English songwriters Alexis Strum and Guy Chambers and produced by the latter along with frequent Monrose collaborator Pete Kirtley for the band's third studio album I Am (2008).

A midtempo contemporary R&B-pop ballad with soft electro pop elements, "Why Not Us" is about a tumbling relationship which ultimately breaks up.

"Why Not Us" was written by British songwriters Guy Chambers and Alexis Strum,[1] and produced by the former, with frequent Monrose collaborator Pete Kirtley credited as a co-producer.

[1] Recorded by Mandy Capristo, Senna Gammour, and Bahar Kızıl for the band's third studio album I Am (2008), "Why Not Us" is a midtempo contemporary R&B-pop ballad that is about a tumbling relationship which ultimately breaks up.

[8] Intercut are solo performances and group scenes that were filmed in front of a green screen and depict Capristo, Gammour, and Kızıl in various settings.