Formed in 1967, the group later consisted of vocalist Ann Wilson, guitarist Roger Fisher, bassist Steve Fossen, drummer Brian Johnstone and keyboardist John Hannah.
Shortly after the group's formation, Wilson's younger sister Nancy joined as rhythm guitarist, Johnstone was replaced by Michael Derosier and Hannah by Howard Leese.
[3] Wilson's younger sister Nancy joined as rhythm guitarist the following year (and became romantically involved with Roger Fisher), while Hannah and Johnstone were replaced by Howard Leese and Michael Derosier, respectively, upon the band's signing with Mushroom Records in 1975.
[4] After the release of the band's first four albums, Roger Fisher was fired from Heart in October 1979 due to increased tensions within the group, stemming from his lifestyle and breakup with Nancy Wilson.
[12] In 2002, a new lineup of Heart was introduced featuring returning members Olson and Smith, as well as new bassist Mike Inez and keyboardist Tom Kellock.
[25] The lineup for the tour included long-time guitarist Craig Bartock and former drummer Denny Fongheiser, plus new members Ryan Waters on guitar, Andy Stoller on bass and keyboardist Dan Walker.