"You Should Have Known" is a song performed by Laura White. It was released on 9 November 2009 in the United Kingdom as the first single from White's upcoming debut album.
It was written by White. The song premiered on White's official website with three other album tracks. Fans then had the chance to log onto the website and vote for their favourite song to be White's debut single. "You Should Have Known" thus won the poll and became the single. It reached No. 32 on the UK Singles Chart on 8 November on the basis of digital downloads but dropped to No. 53 in its second week on the chart.
White performed the song on GMTV in August 2009. She appeared briefly on BBC2 children's TV show TMi on 31 October 2009 to promote the single. White also hosted an edition of chart show's Daily Fix. She also appeared on the ITV show, Loose Women, performed on The Alan Titchmarsh Show and had an interview on BBC Breakfast on 2 November 2009. Meanwhile, press-wise, in November 2009 she did a musically-significant interview with noted UK R&B writer Pete Lewis of the award-winning 'Blues & Soul'.