The former Liberty X singer took a solo shot on the show and the gamble paid off, being voted the champion in the live final on Saturday night.
Having had a few days for it all to settle in, Kevin says he's been left "totally overwhelmed" by the result.
Describing his experience on the show as "life changing," Kevin said: "Regardless of if I won or not, it's just given me more belief in myself and given me a massive love back for music and singing."
The talented prformer added to Newsround: "I can't believe this is all happening to me, I've got a single in the charts! It's crazy."
After winning, Kevin released his new single All You Good Friends and it's currently rushing up the charts, sitting at Number 2 on iTunes right now.
In last night's chart update the song was at Number 10 after just a day on sale.
Asked what getting to Number 1 would mean to him, Kevin replied: "That would be the most unbelievable thing to happen to me ever, but whatever happens."
Kevin went on to insist he had no idea about the show's plans on ITV next year, but said of coaches Boy George, Ricky Wilson, Paloma Faith and Will.i.am: "I think they've been absolutely brilliant this year, it'd be nice to see them on the next show."