Justin has played guitar for The Rio Trio, The Snapsons, The Snapkins, Starpower, and Zsos. Zsos is self-described as YouTube's house band who takes requests from viewers. (Nota bene — not house as in electronic dance music... but rather house band as in band who regularly plays at an establishment. And yes, the establishment in question is the Interwebs.)
Check out this Zsos (feat. Mu-Hua Cheng) clip. They're covering Jason Mraz's song "Who Needs Shelter?"
The song is hopeful and happy and stoically sad all at once. Justin's girlfriend points out in this clip's YouTube comments that he is playing his not-often seen guitar, Michelle. I especially like the harmonies in this song, and the guitar dialog. Is that a valid thing to say? I think guitars talk. (Also, I think that if I leave the closet doors open at night the closet monster will kill me... so what do I know. I digress.)
Justin rarely presents non-collaborative efforts, so here is a rare solo effort. He is covering "When I Fall" by the Barenaked Ladies:
The guitar work is particularly impressive; faithful to the original while still infusing original emphasis. The vocal work conveys more tranquility than Ed's slightly more anguished version. Justin is equally comfortable finger-picking crisp notes and driving a rhythm with lush strums.
Overall, A+. Obvious awesome points for multidisciplinary creativity and technical competency. Triple bonus points for being the house band of the Interwebs.