Alicia Keys has revealed a big backstage secret from her performance at the Queen's Party at the Palace.The American singer, 41, was invited to take part in the Queen's Platinum Jubilee, joining a number of other top musicians who performed for the monarch at Buckingham Palace. But the singer has dropped a massive bombshell, confirming that the Queen herself chose the entire setlist that she performed, including Alicia and Jay-Z's 2009 hit song, Empire State of Mind.