Robin's Laws of Good Gamemastering -- The single best how-to on being a good GM I've ever read, although some of Aaron Allston's Justice, Inc. work comes very close.
Kero: Candy Man! -- My lil' mascot meets Christina Aguilera.
Love Hina: Can-Can -- Keitaro Urashima vs. Orpheus In the Underworld?
Hamster Dance AMV -- As laurie_robey said, "I feel so 'old school' for remembering the original Hamsterdance..."
Leave It to Kero-Chan, Bonus! -- A short that was apparently on one of the CardCaptor Sakura theatrical releases. Kero vs. Spinel for the fate of an octopus hush-puppy! ...um, yeah.
Kero Wants His Cake! -- And to eat it, too.
Star Trek Cat Fight -- I'm guessing the black one is Spock and the calico is Kirk.
And finally ... the Twelve Days of LiveJournal!