"the partridge family." cassidy was such a big deal, gracing the cover of teen magazines, sometimes all of them, tonight he has died of an organ failure at 67. we look back at david cassidy's incredible career. ♪ >> david cassidy was the ultimate teenage idol, known for his role as keith in "the partridge family," his fresh face captured the hearts of millions of girls worldwide. >> you're taking auto shop. >> me too. >> the "the partridge family" about a family in a rock and roll band ♪ i think i love you ♪ >> i think i love you sold over