Karen Carpenter was the instantly recognisable lead singer of the Carpenters. The top-selling American musical act of the 1970s, they delivered the love songs that defined a generation. Karen's musical career was short - only 13 years. During that time, the Carpenters released 10 studio albums, toured more than 200 days a year, taped five television specials, and won three Grammys and an American Music Award. But that's only part of Karen's story.