Full video of Vladimir Putin playing the piano and singing "Blueberry Hill". The Russian prime minister is used to taking to the stage, but this time it was not for one of his speeches. Vladimir Putin made his audience sit up and take note, as he sang at a charity fundraiser. The reception at an ice stadium in St. Petersburg was dedicated to fighting children's cancer. International celebrities including Kevin Costner, Gerard Depardieu, Mickey Rourke, Sharon Stone, Kurt Russell, Vincent Cassel, Monica Belucci, Ornella Muti, Goldie Hawn and many others attended the benefit concert. Many of the stars are actively involved in charity work which draws needed attention to children's oncological and ophthalmological diseases.