Molly Sims may be approaching the big 50 but she still looks like she is in her 30s.

This weekend the Vegas actress took to Instagram to show off her incredible figure while on a beach vacation in Mexico.

The former Old Navy model was making the most of a tiny black string bikini that highlighted her trim tummy.

The 49-year-old star said she was on a Girls Trip with her longtime girlfriends.  

‘Girls trip: activated. Celebrating our bestie @michellecarlson02 turning 40 forever!! Austin meets Los Angeles and a bit of NYC. Vamos!’ wrote the wife of Scott Stuber, a honcho at Netflix.

Leggy lady: Molly Sims may be approaching the big 50 but she still looks like she is in her 30s. This weekend the Vegas actress took to Instagram to show off her incredible figure.

A 10: In the new images, Sims looked flawless with no cellulite, stretch marks or fat anywhere on her lean body

The siren – who pushed her Valentine’s Day Gift Guide last week – had her blonde hair pulled back in a sassy do.

And she added pretty gold jewelry for her pinup photos that were taken at a resort.

In the new images, Sims looked flawless with no cellulite, stretch marks or fat anywhere on her lean body.

She was muscular but also svelte.

While outdoors on a rocky pathway, she made her best Vogue moves with her hands on her hips and one knee out.

The star rocked a light pink mani and pedi for her girls weekend. 

And she already had a nice golden tan from the bright sun south of the border. 

Now with a wrap: Here she added a colorful wrap jacket as she posed with a pal

A week ago the she flashed her tummy and toned arms while in a black lace bra that was semi sheer as well as little undies, stockings and heels as she posed with a creamy light pink cake.

The looker was promoting her Valentine’s Day Gift Guide for her eponymous website.

On Instagram she shared the saucy photos as the leggy wonder added the caption, ‘Have your cake and eat it too -My Valentines Day Gift Guide is ON.’

In the pink: In another post, Molly was seen in a pink two piece with a friend who wore a red one piece swimsuit

A good time was had by all: Molly puckered up a bit as her pal smiled away

She was seen sticking her finger in the cake making the post quite suggestive. 

On her website she listed some of the items she was recommending and they don’t come cheap.

One of the items is a PAT McGRATH LABS MatteTrance Lipstick for $39.

There is also the CozyChic Adult Robe from Barefoot Dreams for $127 and the Baccarat Rouge 540 Eau de Parfum MAISON FRANCIS KURKDJIAN that can run up to $625.

One of the pricier items is the MS X SRJ Diamond Pinky Ring from Shylee Rose for $1,925.

And the former Old Navy spokesperson explained what she was up to with her list. 

Lovely and lean: A week ago she showed off her very lean body on social media on Friday

‘February 14th is fast approaching, which means it’s time to start finding the perfect gift for her,’ she wrote on her site.

‘Whether she loves fashion and a great new outfit, travel accessories for her next getaway, roses, chocolates, and flowers, or a sentimental gesture, it’s time to treat her to something special.’

She then shared, ‘While gift-giving may not be your love language, we are here to guide you. Below are 25 chic gift ideas she will surely love and cherish – mostly because they came from you.’

The love of her life: Sims and  Stuber celebrate the 80th Annual Golden Globe Awards at The Beverly Hilton on January 10 in Beverly Hills