The lovable host welcomes Lost star Matthew Fox, who is set to appear in Neil LaBute's play In a Forest Deep and Dark (bet one subject they won't be broaching is his extracurricular activities in the marital stakes), and German actress Diane Kruger discusses her new film Unknown (which really is a shoddier version of Taken). Singer-songwriter Jessie J, the winner of this year's Brit Awards Critics' Choice Prize, performs her chart-topping single Price Tag.