Man, I wish I could've seen this on my date (which was awesome). I want full set videos!
Ironically, Motion City Soundtrack had the same issue a few years ago, and, if I remember, so did Taking Back Sunday? Who else had full set guest vocalists?
Such a fantastic idea, I'm disappointed I've never seen any of these live.
TBS had a few people sing with them towards the end of Warped 2012 when John Nolan was having a kid. I know Dan and Phil from Story of the Year both subbed in for Anberlin a couple years ago too.