 Why do fools fall in love? Diana Ross, 44 years old and an endurance chart champion. She comes in at number three. I'm Casey Kasem on an American Top 40 special presentation, The Triathlon of Rock and Roll. Now at number two, we're up to a man who formed the group that changed pop music forever. The most successful group in chart history. When they broke up, all four members pursued solo careers. Then in the mid-70s, he dropped out of sight.