Louisa Johnson's new single Forever Young has gone straight to the top of the iTunes chart, hours after winning the X Factor 2015.

The single, a cover of a song originally written by Bob Dylan, was also Louisa's 'winners' song' on the show last night after she soared to victory ahead of rivals Reggie and Bollie.

The singer tweeted this morning that she was on her way to the BBC studios to record a version of the song for Radio 1, which is out as an mp3 now.

@Louisa wrote: "Literally had about 2 hours sleep but I'm on my way to @BBCR1 to to play @Grimmers my DEBUT SINGLE!!!."

Having won the X Factor, the Chafford Hundred star has embarked on "the real work" her new boss at Syco Records tweeted this morning.

Global Head of Music, Simon Gavin, tweeted from @simongavin: "Well done @louisa ..well deserved winner. Now the real work!"

Winners of the X Factor are automatically adopted by Simon Cowell's record label Syco Entertainment.

Video coming soon of Louisa singing her winning song, live on the X Factor final last night.