If this is trolling, then the members of Grizzly Bear are willing to go much farther than oridnary human beings for the lulz. On the b-side for Grizzly Bear's latest single, "While You Wait for the Others," the track's vocal duties are helmed by none other than former Doobie Brother and Steely Dan member Michael McDonald, a man so smooth he makes chocolate syrup look like chunky peanut butter. The single's currently available on iTunes and on Grizzly Bear's official site, if you feel like a genuinely perplexing music experience. [Pitchfork]