Steve Fossen and Michael Derosier are founding members of the iconic, classic rock band Heart — formed in 1975 and disbanded in ’82. Though the original band’s time came to an end, the two founding members started a new group to carry on its sound and music — Heart by Heart. “We have a lot of laughs, a lot of fun and we meet a lot of people — it’s very gratifying.”On Tuesday, Feb. 3, Heart by Heart will take the stage at The Fox Tucson Theatre. Heart by Heart was formed in the early 2000s, years after the original group disbanded. According to Fossen, Heart by Heart started out as a hobby, but gained notoriety quickly and began touring and performing at venues across the country.