From her bio:
Gardot's early career began as an exploration in music therapy. She was hit by a vehicle while riding her bike at age nineteen. Following her accident, Gardot was instructed to take up music therapy as a way to rebuild her cognitive impairment. Before her accident she had played piano and it was suggested that music therapy, which has been shown to help redefine neural pathways, would benefit her. Since then, she often speaks and advocates in favor of music therapy.
In the accident, she hurt her pelvis, so she couldn't sit to play the piano. During that time, she learned how to play the guitar. To this day, she needs a cane to walk, and, when performing, she sits on a special chair (or stands). Besides that, she also became sensitive to both light and sound.
She's only 24, and I think she has great talent as a Torch Song Blues and Jazz singer.