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Jessica Simpson, Eric Johnson, White House Correspondents Dinner

Dimitrios Kambouris/Getty Images

Looking amazing doesn't just happen in a snap.

Jessica Simpson stunned during the White House Correspondent's Dinner in Washington D.C. on Saturday night, but the preparing for her glamorous look started long before she stepped out with Eric Johnson.

E! News learned that Simpson flew in on a red eye because her flight was delayed. After landing, the mother of two took a short nap and then worked out to get her energy up. After getting her fitness on, Jess ate a late lunch with Eric and her team, then started hair and makeup.

"First date since having baby Ace. Thx @usatoday #bts #whcd #beforewetriedtobeyoungagain," Simpson captioned a photo of her and Johnson before the dinner.

Simpson showed off her fabulous figure in a flowered Carolina Herrera gown that she wore with Neil Lane earrings and a bracelet. And she stunned yet again later in the night for the afterparty.

The 33-year-old star changed things up by putting on a low-cut black dress that also featured a thigh-high slit when attending the Vanity Fair and Bloomberg party.

Get it, girl!

—Reporting by Michelle Falls