Pop icon Grace Jones performed her 1985 hit Slave to the Rhythm as part of the Queen's Diamond Jubilee concert.
She sang the lyrics "keep it up" - and indeed the rest of the song - gyrating a large hula hoop on her hips.
Picnickers are enjoying a Heston Blumenthal feast in the Buckingham Palace Gardens before the Diamond Jubilee concert.
The Queen watched a star-studded Diamond Jubilee Concert outside Buckingham Palace on Sunday evening.
Here are some of the best pictures from the Diamond Jubilee River Pageant.