Cassandra Wilson, the two-time Grammy Award-winning jazz singer, songwriter and producer has died.

Dubbed America's best singer by Time magazine in 2001, Wilson was best known for her genre-bending voice, which expanded the boundaries of traditional blues-based jazz and worked effortlessly across folk, pop, R&B, country and beyond.

At the heart of all her work was her idiosyncratic contralto, a soulful sound distinctly tied to her roots.