Sir Paul McCartney, Mike Oldfield, Dizzee Rascal, Frank Turner, Underworld and Emeli Sande were paid a nominal fee of £1 for their performances at the Olympic Opening Ceremony. 

(They had agreed to play for nothing, but had to be charged token fee to create a contract with the London 2012 organisers.  Ah – contracts and lawyers, they don’t understand the word “volunteer”.)