I was in your band, Madge

From the BBC

Rock guitarists Eric Clapton, Brian May and Jimmy Page were among musicians greeted by the Queen at a reception to honour British musical talent. When the Queen asked "what do you do?", Queen guitarist May said that he had performed on the roof of Buckingham Palace at the Golden Jubilee concert.

"Oh! That was you, was it?" the monarch replied, before asking Clapton how long he had been playing the guitar.

Never get your Queens confused - which one tied her mother down?