The host is joined (not so live) by the American pop star and trendsetter, who performs four songs from her latest album Born This Way, including the title track, You and I and The Edge of Glory. She also talks about her hugely successful music career, which has seen her sell more than 50 million singles in three years and be regarded as one of the world's most powerful celebrities - but sure you know all that already. Birrah GaGa not your bag? BBC2 have got their hands on The Kennedys, it starts at 9.00pm tonight with a double bill.