No, I'd never heard of him either, until I watched Glasto on BBC2 where he was the highlight of the highlights singing the wonderful Pencil Full of Lead.
His new album - Sunny Side Up was released last month. It's a cracker and with its eclectic and eccentric mixture of references and genres it's also a curious thing. You could set it as a problem for a musical Ingénue:
Popular Music 101: Listen to these ten tracks and identify the genres.Pencil Full of Lead? It reminds me of no one more than Louis Prima 1, and with the reinforcing reference to Reet Petite, I'd identify it as swing.
Bonus marks are awarded for detecting influences and musical references.
Here's my other favourite - 10/10
I'd say that was is Ska. Other songs are variously country, pop, folk and is that even a Calypso tune? Anyway it's all great stuff, here's a playlist of my favourites: sharpen your exam pencil and post your analysis in a comment.
(1) it's no surprise, therefore that you can also find Nutini covering I Wanna Be Like You on YouTube.