I thought I'd had a completely original idea, until I googled "ugly sweater party" in images, and got 131 hits. This just verifies that it is a brilliant idea, and worthy of imitation.
Here is the challenge. Post a photo of a very ugly sweater. There are no game rules. It doesn't even have to be your sweater.
Also, set aside Friday, November 24 as International Ugly Sweater Day. Don your worst sweater, and plan to be at my house by 7:00 pm. The time may change, but you will be barred entrance if you come in something that is not ugly. Bring something with you that is consumable, because this is also my 39th birthday party. I don't want gifts, except that I want my house to be full of women who never looked so bad. This is not one of those parties where you should sweat for days wondering how you'll save the money to buy the hostess a crystal vase, or have to go to a specialty cheese store for ingredients for your hors de vors. (I'm not even sure I know how to spell that). I'm not the kind of hostess who will wash the dust off your feet as you enter my dazzling abode. You'll likely be dustier at the time of your departure, but your immunity will be way, way up from laughing a lot, your tummy will be warm and full, and you will believe again in peace and good will.
There will be a special prize for any silent readers who tell me of, or show me a picture of their ugliest sweater. Also for anyone who is unable to book their flight in time for the 24th, you will be specially honoured if you humour me with a blog post instead.
Go on then. I'm in a bit of a hurry myself because my friends are arriving here in a few minutes and we're off to the thrift shop to get at the best of the lot before the rest of you read this.