Well, you can always get a plastic, pink sparkly one at a box store. But, my mom says those are wrong and Jesus would be offended -- so if you want a live tree, here's where you can go get one. 

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I think that sparkly pink trees are the best kind, personally. And you know what? I don't think that Jesus cares what kind of tree you have, and it's his birthday not yours, Mom.

Anyway here's a list.