Sam Tsui and AHMIR singing a mash-up of "Nothin' On You" and "Hey Soul Sister." If you don't know AHMIR, you should, because they're a very talented R&B group. Definitely recommend that you subscribe to their channel and check out more of their videos: http://www.youtube.com/AhmirTV Also, check out my friend Frank who created a sweet track: http://www.youtube.com/FrankSacramone