Lady Gaga toned down her normally raunchy dress sense for the Queen when she joined a host of stars at the Royal Variety Performance.
The Poker Face singer - renowned for showing off her figure in skimpy outfits - donned a red floor-length PVC gown with a 20ft long cloak for the gala evening attended by the monarch and the Duke of Edinburgh.
Also sporting matching red eye make-up, she played a "floating" piano suspended on giant stilts as she performed her song Speechless to the audience in Blackpool.
The New Yorker aped the famous quip John Lennon made at the 1963 show as she told the crowd: "Let me hear you rattle your jewellery.
"My father is here tonight and I wrote this song for him, it's called Speechless."
Other stars appearing at the annual extravaganza included veteran comedian Frank Carson and singers Lulu, Anastacia and Chaka Khan.
Also on stage was US teen star Miley Cyrus, who gyrated on stage clad in leather hotpants while performing her hit Party In The USA.
The Queen was also entertained by Hollywood actress Whoopi Goldberg who introduced the Sister Act cast, X Factor winner Alexandra Burke who performed her new single Broken Heels and Canadian crooner Michael Buble who sang Cry Me A River.
But dance troupe Diversity, who won the right to perform as champions of Britain's Got Talent, stole the show with their frenetic routine.