At first glance, a ukulele virtuoso might not sound that interesting, but if you give Jake Shimabukuro a chance, he will quickly win you over. The man is a musical monster without limits in style, technique or soul.
Give his mini-concert at TEDxTokyo a listen:
If you like that, I have a lot more music in my review of his performance in Princeton:
The Geek Whisperer 
The first Japanese I saw playing classical latin on uke!