The 18-year-old student from South Shields is now odds on to top the festive chart with his debut single The Climb, after beating rival Olly Murs in the hit ITV1 show with almost two thirds of the 10 million votes.
Speaking on ITV2's The Xtra Factor after the result, Joe said: "I couldn't believe it, I nearly collapsed on stage, it's amazing."
He added: "I feel like I'm floating, just floating around, and I just feel like jelly.
"There was a bit of pressure but I just thought, I made it to the final, so I thought I would just go for it and give it my best shot.
"I've had the best experience of my life."
As the results were announced, he hugged his mentor, fellow Geordie Cheryl Cole, and said: "I can't even speak, thank you so much everyone."
Cheryl told him: "I feel over the moon, I'm absolutely delighted. The right person won. I'm so proud of you. The North East are going to be going mad."
Simon Cowell told the young singer he was "gutted for Olly" but "thrilled for you because you're brilliant".
One of the highlights of the Sunday finale was an appearance by Sir Paul McCartney, who sang Drive My Car with Joe, Olly and the other 10 X Factor finalists. Joe's single, The Climb, is available for download today and will be in shops on Wednesday.