A video of the band Guster performing the song "Demons" with the help of an audience member named Crystal, who requested the song and was plucked out of the crowd to play ukulele and sing. This was during Guster's acoustic performance at the Calvin Theatre in Northampton, Mass. on January 17, 2013. Read a review of the whole show here: http://www.valleyadvocate.com/blogs/h...
