"Number 1" is a song by Ghanaian-British rapper Tinchy Stryder featuring vocals from Dappy of N-Dubz and co-written by Dappy, James Lavelle and Fraser T. Smith, who produced the track, for Stryder's second studio album, Catch 22. The song was released as a single on 20 April 2009 from Stryder's studio album Catch 22 and a remix was later included on N-Dubz's second studio album, Against All Odds.
The version released as a single and included on Catch 22 features verses by Dappy and Stryder only; however, the version that appears on Against All Odds features new verses by Tulisa and Fazer. "Number 1" topped the UK Singles Chart, a position it maintained for three weeks. Internationally, the song also topped the charts in the Republic of Ireland as well as peaking within the top forty of the charts in Denmark and Slovakia. When "Number 1" topped the UK Singles Chart, it became the first single entitled "Number 1" to peak at number one on any national singles chart in the world.
^Chisling, Matthew. "Review: Catch 22". AllMusic. Retrieved 2 July 2020. "Number 1" is electric first, rap second, and is perfect just like that
^Balls, David (14 August 2009). "Review: Tinchy Stryder: 'Catch 22' ". Hachette Filipacchi Médias. Retrieved 2 July 2020. With experienced hand Fraser T. Smith (James Morrison, Craig David) behind the mixing desk for half the album, Eurodance synths and clubby beats are used in abundance, and the tricks that gave 'Number One' and 'Take Me Back' their radio appeal are repeated on 'Spotlight', 'Halo' and the Olive-sampling 'You're Not Alone'