A certain Christmas song says, "It's the most wonderful time of the year." And a poll found that 78 percent of Americans call Christmas their favourite holiday. That doesn't mean Christmas is stress-free, though. If you've got a Christmas party coming up, figuring out what to wear to a Christmas party can give you pause. But you've got more options than you may realize. The best Christmas party outfits will make you feel festive and cheery. Best of all, you won't feel like you're dressing up as one of Santa's elves. Read on for some of the best Christmas party…