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More than 10 million votes were registered as Ben and Fleur battled it out in front of 10,000 people at the live show with millions more watching at home.
Speaking about his win, an overwhelmed Ben told host Dermot O'Leary: "You can't ever imagine you're going to get to this stage of the competition. I can't believe it. I just can't believe it. I'm lost for words."
Both finalists got to perform this year's winner's single, One Republic's 'Something I Need', with Ben's version already available to download following his win.
Other highlights of the two hour show included a bigger and better version of 'Uptown Funk' from Fleur and Ben tackling Michael Jackson's 'Man In The Mirror'.
'X Factor' alumni One Direction took to the stage with Rolling Stones legend Ronnie Wood (yes, really) to perform 'Where Do Broken Hearts Go'.
Also making guest appearances were man-of-the-moment Sam Smith and Olly Murs and Demi Lovato, who performed their new duet, 'Up'.
The spectacular final also saw the return of Mel B to her judges chair after missing Saturday night's show (and seeing her contestant Andrea voted off the show) when she was struck down with a mystery illness.