Sisters Ann and Nancy Wilson are the creative spark behind Heart, a hard rock group who initially found success in the mid-'70s only to reach greater heights after engineering a major comeback a decade later. The daughters of a Marine Corps captain, Ann (born June 19, 1950) and Nancy (born March 16, 1954) grew up in both Southern California and Taiwan before the Wilson family settled in Seattle, Washington. Throughout their formative years, both were interested in folk and pop music; while Ann never took any formal music lessons as a child (she later learned to play several in...