Lady Gaga Shares MAYHEM Inspo and Praises Fiancé Michael Polansky (Exclusive)

Lady Gaga chats with ET's Rachel Smith about the inspiration and themes behind her new album, 'MAYHEM,' out now. The GRAMMY winner explains why she was nervous returning to her pop roots, her lifelong obsession with 'the dark arts' and what she loved most about collaborating with fiancé Michael Polansky.