Jessica Simpson's outfit is definitely not plaid-tastic -- so we're gonna just say this plaid-on-plaid look is a total plaid-tastrophe! What was she thinking?! We're all for power clashing contrasting prints -- but these two tartans are just an eyesore!

The skinny minny donned the atrocious ensem (which is an $895, McQ Alexander Mcqueen dress) for a business meeting in NYC on Wednesday -- let's hope it's not for her fashion line -- otherwise she's gonna see some pretty intense eye rolls!

Despite being a fashion victim, Jess says she is a lucky girl (and not because her bod' is looking better than ever).

"Eric is the best. Being married, for me, it defines so much more than even having kids. We still feel like we're on a honeymoon," she recently gushed to Us Weekly. The mother-of-two also revealed that being a Mrs. has changed her style and made her much more confident in her sexuality. "It actually has changed my style. I'm very into slip dresses and everything a little bit sexier. I feel sexier as a wife and a mom!" she added.