Up until 2 days ago I had never heard of Matisyahu, but that's all changed now. I've spent a few hours skimming his back catalogue. What an interesting dude, he's evolved a lot over the years both in his appearance and his music. Wikipedia describes him as a Jewish American reggae vocalist, beatboxer, and alternative rock musician. Hell of a mouthful but it's pretty apt.

I'll drop a few videos here which show the diversity/evolution of him/his music. Kind of in reverse order though with the most recent first...