'Cassandra Wilson'

'Let us next consider Cassandra Wilson, who is now in her early 50s and continues to produce work of outstanding merit. Unlike many celebrated voices half her age, Wilson retains an experimental zeal and innovative spirit that keeps her music vital and pleasingly unpredictable. Wilson's collaborations with Canadian guitarist Colin Linden on her 2006 Thunderbird release deserve to be much more widely heard. Wilson and Linden are an effective songwriting team--check out their composition 'Poet.'

source: http://www.jazz.com/features-and-interviews/2008/2/13/the-state-of-jazz-singing-today