Even after a heartfelt attempt with the show R U The Girl?, T-Boz and Chilli have made it clear: There is no replacing Left Eye. But in a tender moment for the group and the fans at the 2013 American Music Awards, TLC celebrated 20 years in music — and 20 years since they first graced the AMA stage together. The group's special performance of "Waterfalls" included Lil Mama, reprising the impressive role she played in CrazySexyCool: The TLC Story, taking on Left Eye's verse (and choreography) for the evening. It was a "breathtaking" experience, she told Billboard afterward.
It's proof that some bands believe in the old adage "strength in numbers." Read on to check out groups that have added new members over the years.