I LOVE BOYCE AVENUE!
I'm pretty confident this is a shure sm57 cardioid
this is when Boyce avenue started using Adam Barber as a recording engineer.
the mic can also be seen in some of the newer videos, like "I want it that way"
plus, you can google Adam barber orlando recording...there is an interview with Adam barber and he states what gear he uses
it's ironic tho, b/c everything I have read says to use a small condenser mic. I'm sure Adam does an amazing job and mixing and eq'ing