The first break-out star at Apple Records was, of course, Mary Hopkin with "Those Were The Days." A huge international hit, it typed her as a cheery ingénue, somewhat removed from her folk roots (and aspirations). Other hits followed, diverging from her preferred stylistic path, until her second Apple album, Earth Song / Ocean Song (produced by her future husband, Tony Visconti) at last gave her some artistic satisfaction. Her story - at Apple and beyond (including session work for David Bowie, Linda McCartney...and The Beatles) - is recounted here by her daughter, Jessica Lee Morgan (herself a recording artist).
Check out Mary's releases - including archival studio and live recordings, as well as recent work - here: