Since
Proposition 8 passed in California, much of Hollywood has been up in arms. Now, they are singing and dancing, too, in a new Web video called "Prop 8: The Musical."
The number is a collaboration between
FunnyOrDie (the video site co-founded by Will Ferrell and Adam McKay) and
Hairspray composer Marc Shaiman. It stars Jack Black, John C. Reilly, Neil Patrick Harris, Allison Janey and a bunch of other Hollywood peeps.
Check it: