10. "Smile", Charlie Chaplin.
9. "I Will Always Love You", Whitney Houston.
8. "Angels", Robbie Williams.
7. "Without You", Mariah Carey.
6. "Over The Rainbow", Judy Garland.
5. "I Have Nothing", Whitney Houston.
4. "Somebody To Love", Queen.
3. "I Don't Wanna Miss A Thing", Aerosmith.
2. "One", U2.
1. And the winner, "Feeling Good", Nina Simone. Here's a supercut of every performance.
"Feeling Good" has been performed six times over the past nine seasons of the X Factor. Beverley Trotman (Season 4), Rachel Hylton (Season 5), Danyl Johnson and Stacey Solomon (Season 6), Rebecca Ferguson (Season 7), James Arthur (Season 8).