1) Garfield is a comic strip created by Jim Davis. It holds the Guinness World Record for being the world's most syndicated comic strip.
2) Garfield is about the life of a tabby cat of the same name and his owner, John Arbuckle.
3) For being as popular as it is, (like most "funnies" in the paper) it's generally really really really unfunny.
4) Someone (someones?) going by the name Lasagna Cat has decided to create video tributes to Jim Davis' strips: first by creating live-action reenactments of the strip (!?) and then by remixing the reenactment and setting it to a popular song (therefore upping the "wtfness" by 180 degrees and two shakes of the head).
5) Seriously, W.T.F.?! I can't tell if this is the best or most traumatizing thing I've ever seen in my life.*
Strip from 3/24/1979, Tribute set to "Bailamos" by Enrique Iglesias.
Strip from 10/26/07, Tribute set to MIDI version of "Cheeseburger in Paradise" by Jimmy Buffett and inspired by the early works of Neil Cicierega
You can blame the folks at the Best Week Ever blog for being the instigators of this traumatic experience.
*Definitely, definitely both.