BLR

There's a YouTube channel called BLR; Bad Lip Reading.  They do AMAZING things with music and movie videos and tv clips where they make up new music and lyrics and make things just..match.  It's awesome.  My favorites are Michael Buble's "Russian Unicorn" and Miley Cyrus' "Black Umbrella."

They recently released this one; not a music video, but check out the work the BLR team does.

"Duuuude! You slapped a fiiish.  You punched it."

And just for kicks, "Russian Unicorn" ("I Just Haven't Met You Yet" - by Michael Buble', who's seen the video and loves it.)  It's PG-13, though, so be warned if you have the kiddies nearby.