Published Thursday, 29 November 2012
The A-Team hitmaker was performing at a lavish wedding earlier this year when he bumped into Princess Beatrice and Princess Eugenie, who were guests at the star-studded bash.
However, the flame-haired pop star failed to recognise Queen Elizabeth II's granddaughters and enjoyed sharing a drink with the pair, who paid him a very odd compliment.
He told The Sun newspaper: "On the first night we had a massive party and I didn't really clock that they were royal and we had a very good time drinking.
"The next day, one of the girls said, 'You know my cousin looks like you'. I said a lot of people say they have ginger cousins that look like me. It turns out that her cousin was Prince Harry."