Maybe the dress Katie Holmes wore to the Met Ball was better left in the toilet.

The actress (and ex of Tom Cruise) was one of countless celebs who showed up at the Costume Institute Gala at the Metropolitan Museum of Art in New York City last night, May 6, to celebrate the opening of the Institute's annual fashion exhibit.

But her Francesco Costa gown was a questionable choice for multiple reasons.

First, whatever the material of the dress is, it looks like toilet paper. It looks like Katie got TP'd — like, legit.

Secondly, it was backless, which perhaps was not the right style for Katie at this time in her life. Her back is just a tad on the bony side and perhaps not ready for primetime. We're leery of joining the hordes of celeb-obsessed weight critics, but homegirl could probably benefit from a nice slice of cheesecake, administered once a day. (And that makes us a bit jealous!)

Check out the video for footage of the possible fashion faux pas.