As he prepares to celebrate his 70th birthday, singing legend Sir Tom Jones is still recording, performing and collaborating with some of the biggest names in pop. In this episode of Imagine, Alan Yentobexamines the extraordinary story of one of Britain's most recognisable pop icons.In a frank and revealing interview, Sir Tom describes the dizzying ascent from his humble beginnings as a miner's son in south Wales to becoming a headline act in Las Vegas and recalls many of his most cherished moments from a career that enabled him to sing alongside Elvis, establish himself as a hairy-chested sex symbol and make one of the most successful comebacks in pop history.