Chipmunks

'Baby, It's Cold Outside' is a fun song (with kind of creepy lyrics). It's usually not performed with Chipmunk voices, however. But on a recent 'Late Night,' Maya Rudolph joined Jimmy Fallon for a funny Christmas duet.

It looks like chipmunks are neck-in-neck with squirrels when it comes to liking peanuts. They're flexible mouths allow them to literally shove multiple nuts, almost the height of their own bodies, into their mouths at once. See one of the glutenous little creatures perform the feat after the jump.

For some strange reason, this woman allows a chipmunk -- who she insists is alive, and does seem to be moving a bit -- to sleep upside down in her hair.