During a diplomatic reception at Buckingham Palace, then-Prime Minister Margaret Thatcher felt faint and was forced to sit down for the second year in a row. Elizabeth said to a nearby guest, "Oh, look! She's keeled over again." Princess Margaret was talking to her cousin's husband Denys, a thriller writer, and asked him how his latest book was coming along. Elizabeth entered the room as he responded, "I desperately need a title." She quipped, "I cannot think of a reason for giving you one." After hearing the Everly Brothers perform "Cathy's Clown" in the '60s, the Queen turned to her lady-in-waiting: "They sound like two cats being strangled." Elizabeth met guitar legend Eric Clapton at a Buckingham Palace reception in 2005 and asked him, "Have you been playing a long time?" Image Source: Getty / Anwar Hussein