Feathers and lace, visible nipples and princess couture -- stars are rocking all the wrong trends this week!

Rita Ora clearly forgot to stand in front of a full-length mirror before stepping out in this Jaime Lee creation. If she had, she would have noticed what her family jewels were showing through the cream bodysuit and thin layer of feathers.

The high neck and dropped waist weren't flattering on the gorgeous Brit, and the feather placement against all that lace is just plain strange.

Lady Gaga turned heads while stepping out of her New York City apartment on Thursday, sporting an all-black, sheer ensemble that completely showed off her nipples.

She accessorized the look with over-the-top jewelry, that included a gigantic Erickson Beamon statement necklace, bracelet and earrings. What was she thinking!?

And, Sarah Jessica Parker missed the mark in an printed, off-the-shoulder Schiaparelli Couture gown at amfAR Gala in New York on Tuesday.

The princess-inspired frock looks like a circus tent, and they way the "Sex and the City" star pulled it away from her body made it even more unflattering.

But these ladies weren't alone -- see more of this week's worst dressed stars in the gallery above!

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