Jessica Simpson's Waist Looks Tinier Than Ever in Dramatic Black Dress With a Thigh-High Slit

Quite the dramatic look Jessica Simpson was rocking there for a morning show interview

The hotter-than-ever mama showed up for her sit-down with Today's Savannah Guthrie, airing Monday, in a long black dress from her Jessica Simpson collection that boasted a plunging V-neckline and a thigh-high slit up the left side.

And why not?

The Weight Watchers spokeswoman has been working hard (on both her body and her entrepreneurial pursuits) since giving birth to son Ace last June, so she deserves every chance to show off the fruits of her fitness labor.

Simpson accented the look with matching gold cuffs, perfect for the Forbes Women's Summit in NYC, which she attended after her Today taping with fiancé Eric Johnson.

"Loved chatting with entrepreneur and fashionista@jessicasimpson - interviews airs Monday@todayshow," Guthrie put on Instagram along with a pic that showed off her own growing baby bump.

Simpson polished her own powerful-woman prestige by attending the White House Correspondents Dinner earlier this month—aka her and Johnson's "first date since having baby Ace," which is how she referred to it on Instagram.

The couple sat with the USA Today group and Simpson stunned in a strapless Carolina Herrera gown.

Jessica Simpson Shows Off Skinny Waist at White House Correspondents' Dinner

Jessica Simpson rocked the red carpet with her fiancé Eric Johnson

Look out, Washington! Here comes Jessica Simpson! The singer, who has been flaunting her new svelte silhouette in recent weeks, rocked the red carpet with her fiancé Eric Johnson at the White House Correspondents' Dinner in D.C. But one of her best accessories was definitely her healthy figure and big smile. 

Jessica showed off a tiny waist in a flowered Carolina Herrera gown that she wore with Neil Lane earrings and bracelet. Eric wore Ralph Lauren and posed side-by-side with his future wife. 

Sources told E! News that Jessica's weight-loss secret has a lot to do with her children, especially Maxi, who is almost two-years-old. The mom has shed the pounds by chasing after her brood and playing on the swings in their backyard. She is also fond of taking walks, gardening and other outdoor activities that keep her moving. 

Jessica recently talked to Good Morning America about the importance of living healthy instead of opting for quick-fixes and fad diets. 

"I really do feel this need to be the best role model for my children," she said in January. "I want [Maxwell] to look up to me and want to be like me...I don't want to give her any false perception of what is real and what's important." 

Whatever you're doing Jessica, keep doing it! You look amazing!

Jessica Simpson Shares Sweet Kissing Photo With Daughter Maxwell

Jessica Simpson shared a sweet snapshot of her planting a wet one on daughter Maxwell

Jessica Simpson is getting a head start on her family-filled Easter weekend! The slimmed-down blonde shared a sweet snapshot of her planting a wet one on daughter Maxwell on Instagram earlier today. 

"Kissed by an angel," the proud mama captioned the pic. 

But it looks like the affectionate kiss didn't come for free. The Weight Watchers spokesperson added, "…for a snickers egg!" 

Hey, whatever works, right? 

The mama of two was just spotted earlier this week on a date night with her fiancé Eric Johnson. 

The two were seen grabbing a bite to eat sans their adorable kids at the Chateau Marmont in West Hollywood Wednesday evening. 

Simpson and her leading man were snapped in their chauffeured vehicle; the fashionista sat in the front as her hubby-to-be took a seat in the back. 

Simpson appeared to be sporting a striped top and wore her long locks down in gorgeous cascading curls, while Johnson opted for a casual look in a navy blue tee. 

It's no secret that Simpson is looking fitter and more fabulous than ever. 

The 33-year-old has worked tirelessly to shed her baby weight (an estimated 60-70 pounds, according to one expert), and has named little Maxi as one of her favorite fitness partners. 

"I really do feel this need to be the best role model for my children," she told Good Morning America in January. "I want [Maxwell] to look up to me and want to be like me...I don't want to give her any false perception of what is real and what's important."

Celebrate National Siblings Day With Pics of These Hot Celeb Relatives!

Go Show Your Brother or Sister Some Appreciation Today

It's National Siblings Day!

Go show your brother or sister some appreciation today! Sure, they may get on your nerves at times, but at the end of the day it's all love, right?

And there's no better way to celebrate than with some of the sexiest celebrity siblings in Hollywood, like Jessica Simpson and Ashlee Simpson or Beyoncé and Solange Knowles! Yes, they're all rich and famous and share a ridiculously amazing gene pool, but they're also always around to support each other no matter what. Liam Hemsworth and Chris Hemsworth, we're talking about you!

And in the spirit of the holiday, let's have fun and enjoy a little innocent sibling rivalry!