They were the hottest siblings in the seventies. Jimmy and Kristy McNichol were singing and acting their way to the top but the quick success came to a screeching halt after Kristy suffered an on-set break down in France. Jimmy rushed to her rescue and together the siblings battled her bipolar disorder. “I even got a little shadow of it from what I've been told,” Jimmy said. “But I don't have all the symptoms.” Kristy keeps a low profile these days but came out as a lesbian recently to inspire others.