Cast your minds back if you will to a little ITV show known as Britain's Got Talent, and a group of talented dancers called Diversity. Ring any bells? Of course it does. Well, last night was all about Diversity taking part in the prize they won when they were declared winners of Britain's Got Talent. Yes, it was the Royal Variety Performance. The group, led by the very-gorgeous Ashley Banjo, got one of the biggest cheers of the night for their inventive and electrifying routine – and they got to meet the Queen afterwards. We've already taken a look at what Lady GaGa was wearing, but you have to check out the amazing Dali-esque piano she had on stage. Peter Kay was also there, dressed up as a rabbit, naturally, and Alexandra Burke, Mika, Katherine Jenkins, Michael Buble and Miley Cyrus all performed for Her Majesty and guests. Scroll through our gallery below for a closer look. We particularly like the Queen's expression as she greets Lady GaGa...