As the lead singer of Grammy-winning supergroup TLC, Tionne "T-Boz" Watkins has seen phenomenal fame, success, and critical acclaim. But backstage, she has lived a dual life. In addition to the balancing act of juggling an all-consuming music career and her family, Tionne has struggled since she was a young girl with sickle-cell disease, a debilitating and incurable condition that can render her unable to perform, walk, or even breathe. A Sick Life...