Pattie Boyd is quite a story, if you're interested in music history. She was the inspiration behind some of the greatest love songs to come out of that era, especially from those two rock legends to whom she was married.
She had an affair with Billy Corgan from the Smashing Pumpkins, but the quiz only asks for spouses. There is a rumor about Courtney Love dating Trent Reznor at some point, but I don't think it has ever been confirmed.