Dead Man's Bones...
(fronted by him and another actor, Zach Shields.)
It's sort of a spooky/gospely/showtunes-ish type band..
I have no idea how to peg it, but this album is SO good.
Children's choir and everythang! You should go buy it.
Here's my rendition of their song "Lose Your Soul"...Happy Halloween! oh wait.
PS: listen to the original version here.