This is about the band named Heart. They are a sister act and they have been singing for three decades; sisters Ann and Nancy Wilson — the core of Seattle act Heart — have shown a knack for holding their own. They have released anthems like “Magic Man”, “Barracuda” and “Crazy on You” in the ’70s and they have made chart-toppers of “Alone and All I Wanna Do is Make Love to You”. Their legacy…