Sir 's friends warned him not to appear on Simon Cowell's "" - but he decided to go ahead after superstar performed on the U.K. talent show. legend played two tracks on the live reality competition last month, December 10, but admits he had to carefully consider Cowell's offer after his pals urged him to turn it down. McCartney insists it was the "Crazy In Love" singer, as well as former X Factor winner , who inspired him to perform on the show.
He explains, "Actually, when the offer came through it polarized a lot of people. Lots of my friends told me not to do it. It's a pop show. But what turned me around - apart from the huge audience - was the fact that it's a family show, and so many kids are obsessed by it. Also, Beyonce was on it, and if it's good enough for her then it should be good enough for me. Plus, it threw up Leona Lewis, and she's no slouch. Know what I mean?"