There are so many things we could say about the t-shirt Christina Aguilera is wearing in these photos, but we'll try to show some restraint. (And yes, we have been particularly obsessed with the whole celeb nipple sighting thing lately - but judging from the number of tips we've been receiving, it seems that many of you are too.)

Christina Aguilera (photos @ thesuperficial.com - via Karl, who recommends you look closely at photo #4)
Previously: Christina Naked (Not), Christina's Thong @ eBay

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