A cool young vocalist that I'm kinda partial to: José James. Apart from a tremendous charisma, he's equally at home doing straight-up crooning (and he has the silky voice to do it) as well as more adventurous jazzing. Often he just switches between both in one concert. His last album was recorded with production credits by Flying Lotus & Moodymann.
Don't know how well known he is in the States, over here in Europe & esp. Belgium he's become somewhat of an audience darling. Much of that is the result of a phenomenal concert he did in Brussels, with local pianist Jef Neve. They did an interpretation of the music by John Coltrane.
In fact, you can stream the whole concert here, in great audio & video quality (warning: over 2 hours worth of great music ahead):
http://www.abconcerts.be/nl/abtv/p/d...james-jef-neve
Check it out. On a completely different note, I really dig the mad version of bop by the Japanese outfit Soil & Pimp Sessions. Here they are at Jools Holland:
http://www.youtube.com/watch?v=YWHP_mGPlJk
They used to be punk musicians, and that energy is still palpable in their live shows (just look at the horn players mounting their foot on the speakers, blaring at the audience!)