The singer beat Nicholas McDonald in the live final tonight (December 15) after Luke Friend was eliminated yesterday.
Sam's win means Sharon Osbourne has finally had a winning contestant.
Sam's single is a cover of Demi Lovato's 'Skyscraper' (which we love) with all proceeds going to Great Ormond Street Hospital and Together for Short Lives.
The final saw live performances from Katy Perry, One Direction and Elton John.
Was Sam your winner? Let us know below.