Cast your mind back just over a decade, to a charity benefit gig in St. Petersburg in 2010. Sharon Stone, Kevin Costner, Gerard Depardieu, Vincent Cassel, Goldie Hawn and Monica Belluci are in the audience. But the star-turn is performed by a man from another branch of entertainment altogether (‘show-business for ugly people’) who in a warbling voice is giving us his rendition of Fats Domino’s ‘Blueberry Hill.’