"WE" is the name of a performance art piece by artist Doug Aitken. It was performed at a charity gig in November 2010.
Prior to its performance, Beck, Caetano Veloso & Devendra Banhart played a short set of songs together and alone.
"WE" was a piece organized by Aitken. Reports indicate that Beck participated in "WE," alongside a bunch of drummers, farm auctioneers, and a guy with a whip. I'm not sure exactly what he did, though, or what was going on there exactly.