TLC utilized different eras’ R&B and rap sounds so smoothly that you’d be forgiven if you didn’t register the depths of their references. In Donna Summer’s “Love To Love You Baby,” you hear the innovations that drove TLC’s deft ability to make a glitzy, expensive-sounding song feel strikingly elemental. And in ’90s hits like Queen Latifah’s “U.N.I.T.Y.” and Salt-N-Pepa’s “Shoop,” you can see where the group’s crossover sensibility originates.