"I only saw a half-hour clip of the film. It's not finished yet, and it's insane, awesome. I heard the song - great lyrics, very, very epic. So I went in and I did it," Contactmusic quoted Lewis as saying.
"And then they played it to James and he phoned me up and said, 'Oh, my God. I love you!' He's so cool. I had this perception that he was going to be totally untouchable and unreachable. But he's just like your nice uncle. He's lovely," she added.