Adele's recent Grammy sweep may signal a return to the idea of the mainstream successful soul songstress, but that archetype probably wouldn't exist were it not for the great Diana Ross. Her voice helped define soul just as her reported offstage behavior helped define diva. But all of it put together added up to believable, timeless tales of heartbreak, self-sufficiency, and love hard won. As proof of the staying power of her material, Ross has been touring under the banner of "More Today Than Yesterday: The Greatest Hits Tour" since 2010. That retrospective production's whopping fifth leg kicks off in South Florida this Thursday, and as the name indicates, fans can expect all of their favorites from over the years.