God bless the Queen in these situations. Nothing fazes her. She’s seen it all.
(Michael Caine has a funny story in his autobiography about being seated near the Queen at a dinner party where the conversation was lagging and everyone was nervous because it was the Queen and all. She finally broke the ice by saying to him with a smile, “Do you know any jokes, Mr. Caine?”)
The Royal Variety is an annual benefit that started in 1912. Here’s one more shot, with Lady Gaga giving it her best bow. Priceless expression on the kid in the glasses, there.