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Christina Aguilera

Unfortunately, we don't think Christina Aguilera was giving her Jem and the Holograms Halloween costume a trial run while dining at Spago late last week. She just happens to look like an '80s cartoon character on a daily basis.

Watch Xtina's new music video, "Your Body"

What Were They Thinking?!

This week's worst-dressed crew includes musicians M.I.A., Rihanna, and Xtina. -- By Matt Whitfield, Yahoo! Staff