Cecil the Lion, Amy Winehouse, and HitchBOT I get, but who's the drummer?
David Grohl from Nirvana. They somehow thought it would be funny to add him...http://www.funnyordie.com/articles/fbf0d01eb4/hitchbot-and-cecil-the-lion-rocking-together-in-the-great-beyond?_cc=S2d___&_ccid=b3cove.nsjidz
This might have been a prank designed by a Youtube "celebrity":