Sisters Ann and Nancy Wilson formed Heart in Seattle in the first part of the '70s, and by the middle of the decade they'd recorded two hit singles, 'Crazy on You' and 'Magic Man.' Over the next few years, singer Ann and guitarist Nancy led a band through Led Zeppelin-style rock classics like 'Barracuda.' After a few years of waning popularity, the band returned in the mid-'80s with a more pop-oriented sound and became huger than ever, racking up two No. 1 singles -- 'These Dreams' and 'Alone' -- and a string of Top 10 hits (as well as their only No. 1 album, 1985's self-titled record). Over the years, members have come and gone from Heart, but the Wilsons sisters have remained a solid core well into the '00s