Once (Diana Vickers song)

"Once" is a song by the English singer-songwriter Diana Vickers. It was written by Cathy Dennis and Eg White for Vickers' debut studio album, Songs from the Tainted Cherry Tree (2010). "Once" was produced and mixed by Mike Spencer and released as the album's lead single and Vickers' debut single in the United Kingdom on 19 April 2010. It reached number one on the UK Singles Chart, making it Vickers' most successful single release to date.

Diana Vickers (born 30 July 1991) is an English singer-songwriter, actress and fashion designer, who initially came to public attention as a semi-finalist on The X Factor in 2008. In 2009, Vickers signed a record deal with RCA Records and after touring with her fellow finalists from The X Factor, played the title role in a West End revival of The Rise and Fall of Little Voice.