Hey there, good lookin'!
The mother-of-two looked fabulous in a white one piece, retro-inspired swimsuit that hugged her every curve.
Simpson topped the look off with a pair of oversize pink sunglasses and Brigitte Bardot-esque tousled hair.
Back in November, the 33-year-old teased a photo from the photo shoot.
"Guess which mama I get to play dress up with today? #bts," Simpson's stylist, Nicole Chavez, captioned the Instagram pic on Friday, Nov. 15.
The hazy yellow-tinted snapshot showed Simpson in the background, lounging in front of a pool in the same chic bathing suit.
The picture, along with a few other shots of her in the same ensemble, are all for Jessica Simpson Collection's latest line.
Shortly after posting the pic, Simpson also shared a picture from an old advertisement she did with photographer Peter Lindbergh.
"#tbt Brown hair don't care #peterlingbergh," she wrote.
Simpson channels old Hollywood glam and flaunts major cleavage in the flashback pic.
The former Fashion Star judge has been active on Instagram lately, having only joined the photo-sharing site a little over two weeks ago.
Over the weekend, she gave fans a glimpse inside her personal life by posting several never-before-seen pics of her with her kids, Ace and Maxwell.