Kate Middleton, Prince William and Prince Harry enjoyed themselves during a pop concert at Queen Elizabeth II’s Diamond Jubilee !

Robbie Williams opened the show with his version of “Let Me Entertain You,” which the three musketeers seemed to enjoy—how thrilled does Kate look waving her flag in the air?

The Duke and Duchess of Cambridge and company also enjoyed the sounds of Paul McCartney, Tom Jones and Stevie Wonder.