What's the appeal of the ugly sweater? Apart from the grandma/nostalgia factor, it brings humor, bright colors, and just a dash of irony to the dark days of winter.

The rise in popularity of the ugly sweater party has generated a plethora of fantastically ridiculous sweaters. Let this collection of ugly holiday sweaters inspire you whenever you get the urge to wear something loud and silly. There's even a couple in here for your four-legged friends.