Credit: Mayer RCF/Splash News Photo: Jessica Simpson at the Footwear News Achievement Awards on December 3, 2013

Some ladies look just as good dressed up on a red carpet as dressed down with no makeup. Jessica Simpson is one of those ladies ... although it helps when the lady isn't making an odd face at the camera.

Last month, the 33-year-old mother of two showed off her post-baby body in a sexy form-fitting Carolina Herrera print dress at a red carpet event.

Credit: Twitter Photo: Jessica Simpson Goes Makeup-Free on Date Night, December 14, 2013

That's glam Jess, but she's just as comfortable showing pics like the black-and-white one she tweeted late Saturday night/early Sunday morning on December 15: "Aquaphor from the diaper bag...And a filter ;) Date night!"

We're guessing fiance Eric Johnson was probably her date and he might've taken this photo. (Nice bag!) Jessica always looks great without makeup, although she looks like she might be in mid-sentence here — or just doing a duck-face. Well ... we’re all bound to lose the pose war now and again!

Jessica and Eric have been together since 2010. They are the parents of daughter Maxwell Drew, born in early May 2012, and son Ace Knute, born in late June 2013. Last month, the proud mom and dad posed with their kids for a cute family photo.

It's always good for parents to reconnect as partners and have fun date nights. We hope they had a good time!

Sources: Jessica Simpson on  TwitterUs Weekly