It might be hard to tell who is singing on this, but here's the all-star cast that includes Jenny Lewis, Bruce Springsteen, Justin Vernon, and Jenn Wasner of Wye Oak.
I don't actually like Bruce Springsteen, but this song ain't half bad. So... maybe I don't not-like Bruce as much as I thought? Shrug.
The song is an acronym that stands for "Ate Up All Their Cake." Can't say I quite understand the meaning, so I'll let the music speak for itself.