The Outkast rapper was wracked with nerves when the LIKE A VIRGIN singer paid a visit to her director husband Guy Ritchie on the movie's set - but he quickly found common ground with Madonna when the conversation turned to music.
He tells Empire magazine, "Guy yelled, 'Action!' and then she walks round the corner and I forgot all my lines...
"We talked about music - she's starting a new album and she was asking me about music and where it's going and that kind of stuff.
"So I may appear on her new album."