If you plan on kissing someone under a sprig of mistletoe sometime in the next couple months, a good lip plumper is probably on your to-do list. But there are a million of them out there, so how are you supposed to decide what to buy? I've tested out a bunch of lip plumpers — from classics like Lip Venom to newcomers like LipFusion Infatuation — and now I'm presenting my findings. Whether you want a lot of pout, just a little, or long-lasting fullness, I've got them all. So click through and get ready to plump it up.