Wildly popular in Europe, Japan, and Russia throughout the '80s and beyond, pop singer Sandra was at one point the German equivalent to America's Madonna. Before breaking out solo, Sandra was part of disco trio Arabesque and in addition to scaling the charts with her own material, she provided the vocals for most of the early hits of international phenomenon Enigma, the studio project of her then-husband Michael Cretu. After a commercial peak in the late '80s and early '90s, Sandra remained sporadically active, releasing new solo material throughout the oughts and into the 201...