Del McCoury and his band playing bluegrass at the xmas jam. http://www.delmccouryband.com/
This band is so cool because they are so traditional. No amplification on the instruments, only microphones. Rock, Blues, Bluegrass, heavy metal, this jam has it all and it works well. The crowd loved them! That’s Led Zeppelin’s John Paul Jones on mandolin as well as Joan Osborne and Travis Tritt kicking in some vocal work. Very cool stuff.