I've been digging around looking for some newer blues/soul artists and this song is probably my favorite discovery so far (All of his stuff is pretty good as well). It's rather simple, but damn is it catchy!
Stumbled upon this while looking up the artist on the Cowboy Bepop soundtrack and have been in love with it ever since. Oddly enough it's a genre I literally never listen to, and outside of this band, I still don't.
At the moment, its a toss up between;
Bring It On - Giga ft. Kagamine Rin + Kagamin Len
and
Kagafumi Etranger - Substreet ft. Touyu (Side note : This is the male cover. The Hatsune Miku version is great too)