Ashley Graham, Emily Ratajkowski, Chrissy Teigen Plus More Stars in Sizzling Swimwear!

The supermodel celebrated Labor Day by sipping some lemonade poolside with a friend.

Emily is celebrating Labor Day early in her tiny red tube top and matching bottoms. 

The model looks like she's walking on water during her swim sesh at the Dead Sea. 

The secret to getting a perfect belfie like Kourtney's is finding a skimpy string bikini and following her tip of the day: "Don't forget to stretch," she told her followers. 

Emma practices safe sun stylishly in her polka dot-print long-sleeve swimsuit. 

Nina spends her Saturdays with her furry friend in sporty Kore swimsuits. 

Alessandra balances getting her workouts in on vacation by doing yoga in her one-piece - that way she's always ready for a dip in the ocean. 

Chrissy's Below Deck-inspired vacation wardrobe includes glam pieces like this blinged-out black one-piece. 

Katherine accessorizes her striped string Vix two-piece with a gold necklace and tinted frames during her vacation in Hawaii.

If you think Gabrielle's cutout one-piece Velvet Sphynx suit is daring, you haven't seen her other risqué swimwear choices during her Mykonos vacation.

There's only one appropriate caption for Izabel's thong bikini bottom photo, and she nailed it: "Sun's Out, Buns Out," she wrote on Instagram. 

The actress's FOMO kept her from napping during her scenic boat trip … which in turn gave her enough time to post FOMO-inducing photos like this. 

That's the face of someone who's wearing the perfect LBB (little black bikini). 

Hailey captioned her Instagram, "wonder." We're guessing she wants you to "wonder" where to get her strappy cutout swimsuit, but we've got the answer: it's Essentials for Zula. 

The singer appropriately wore a bikini by French designer Louis Vuitton while vacationing along the French Riviera in Saint Tropez. 

If you're wondering if Alessandra ever just stays home in her sweats, the answer is no. Her latest look? A vacation in Bora Bora in her tiniest two-piece and cutest sun hat. 

Heidi's living her best life on vacation because she's in her natural element (posing topless) and wearing her new Heidi Klum Intimates bikini bottoms.

For her trip to Spain, Sara kept her swim style simple in a no-fuss basic bikini.  

A sunny yellow swimsuit always makes for a great TGIF Instagram post: "Looking forward to a fun weekend," Lea wrote. 

Kourtney brought a suitcase full of red-hot pieces to her trip to the Red Sea, which included this itty bitty black bikini. 

A Hawaiian vacation calls for the cutest swim accessories and Hilary packed all the essentials with her wide-brim hat, cute shades and printed cover-up. 

Alessandra sported a teeny tiny hot pink bikini while frolicking in the ocean with her son (not pictured) in Malibu. 

Angel wings! The model is a natural posing with blow-up floatie wings on the beach in Jamaica. 

Rande Gerber knows what daughters are for: waterfront haircuts. 

The star's honeymoon may be over, but the picturesque shots will last her a lifetime of flashback Fridays. 

Eva paused for a quick puppy kiss while spending the day at the beach with her husband. 

The Victoria's Secret Angel is all smiles while cruising on a boat on her last day of vacation in Ibiza. 

Doutzen tossed her top in the wind to take in the beautiful ocean scene wearing just sexy thong bikini bottoms. 

As Rita knows, when in Jamaica, one sports a red, yellow and green Bob Marley-inspired bikini. 

According to Bella, "It's hot AF outside," which means there's no better time to have a full-on bikini photoshoot. 

Just because you've got one of the best bodies in the business doesn't mean you can't also enjoy a slice of pizza every now and again.

Was Sara taking in the sights of Menorca, Spain or posing for a photo shoot? It's impossible to tell. 

Gina celebrated her 33rd birthday by sharing a pic in a strappy bikini that shows off her killer bod. 

Khloé Kardashian shared a pic of her 61-year-old mom posing for a sexy swimsuit mirror selfie writing: "I see you mommy! #6KidsAndBad!"

Her trip to Capri, Italy was spent in wide-brim straw hat, sipping Aperol Spritzs and wearing itty bitty bikinis. Sounds like paradise. 

Why did Paris wear a mermaid one-piece during her vacation to the Maldives? Because she's Paris Hilton. Enough said. 

You might not be able to tell this is comedian Sarah Silverman because she needed to wear two hats, zinc and a bandana over her face but boasts, "I STILL GOT IT."

When you love your metallic suit as much as Molly, a side-angle selfie is necessary. 

The model practices partial safe sun with her long-sleeve crop top. 

If you're wondering, "What is Rita thinking about here?" She saves us all from guessing, captioning the photo: "hawt saowce."

The 42-year-old continues to look "Fergalicious" (we had to!) on the beach in her tiny string bikini in Kauai.

Taylor's high-cut bubble gum-colored PrettyLittleThing one-piece is the perfect mix of sexy and sweet.

Kourtney matched her lace-up bikini to her sun hat for a beach day in Nantucket, Massachusetts. 

For her bday trip to Tulum, Sara packed the perfect birthday suit - a personalized Alt Swim one-piece with her initials written on the back. 

We'd probably opt to wear frilly strapless bikini tops sitting poolside, but Behati makes it work in the prairie field too. 

Sarah hit the beach with two cute things -- her furry friend and her flirty ruched two-piece bikini. 

The swimsuit designer took a break from Miami Swim Week to take a dip in her bandeau top and high-waisted, cutout, gingham bottoms. 

The country star posted this #nofilter Instagram by the lake (in a cute bikini from her line, Calia by Carrie Underwood), taking a moment to remind her followers, "Summertime is all about love... love for people, love for the outdoors and love for living in the moment! Get out there and relax!"

The Pretty Little Liars star got "hot in the city" on Instagram in this black Vix bikini - and her trusty Privé Rivaux sunnies.

Meanwhile, Ashley's PLL costar vacationed in Hawaii in this peach off-the-shoulder Seafolly bikini, which she paired with a L.A. Dodgers baseball cap.

"Hey 'Bu," Munn captioned this snap from the beach in Malibu, where she stayed (relatively) covered up in a striped Vitamin A rashguard and matching bikini bottoms.

The star seemed to be living her best life in Tulum, Mexico, where she wore this striped Shoshanna halter bikini, Jason Wu sunglasses and snacked on some dragonfruit.

U-S-A! U-S-A! The supermodel is clearly still feeling her red, white and blue in this sporty one-piece.

Kate posed alongside newly appointed British Vogue editor in chief Edward Enninful in a chic one-shoulder black suit.

She may have worn shades and a baseball hat (likely to protect her newly platinum hair), but you couldn't miss the 6'2" model while hanging out in Miami beach.

The actress wore a striped bikini while hitting the beach in Marbella with husband José Baston (not pictured).

On day one of her honeymoon, Julianne already captured the most double-tap worthy pic - swinging seaside in a lace white bikini and straw hat while showing off her insane abs. (Does this mean Brooks is the ultimate Instagram husband?)

Lupita matched the crystal clear water on her Mexican getaway with her cobalt blue Valimare one-piece and surf board.

Eva brought the heat to the beaches of Marbella, Spain in her printed string bikini with her hot hubby by her side. 

The Olympic gymnast posed for a seaside photoshoot wearing a halter-style two-piece. 

Only a model who wears a bikini 365 days a year can pull off a ruffled off-the-shoulder top as confidently as Alessandra. 

Adriana spent the weekend on board a yacht in Turkey with her new beau, writer Metin Hara, wearing the best beachy outfits including a white lace coverup and skimpy string bikini. 

Lily wore the cutest LBB (little black bathing suit) during her time in Ischia, Italy with her scalloped, V-neck one-piece. 

Jessica packed all the essentials for an Hawaiian vacation - printed coverup, sporty criss-cross swimsuit and floppy hat. Check, check and check! 

Kourtney managed to merge two of summer's most fun pastimes - eating ice cream and posing in swimsuits.

Bella's such a big fan of Fae Swim that she wore three different tops by the brand in one week, including this sports bra-style top. 

Eva found an easy coverup idea in her closet -- a simple white button-down shirt. Genius! 

First, Tia shared her workout routine on Instagram, then showed off the results in her sexy, strappy criss-cross Bfyne one-piece.

Naomie tackled sun protection stylishly in a chic long-sleeve houndstooth-print swimsuit. (And if you want more UPF pieces in your wardrobe, see our favorite finds here.)

Being a professional swimsuit model and swimwear designer means Ashley will always have the cutest bikinis and most enviable Insta feed during vacations.  

Alessandra's colorful hair and seashell-adorned bikini are proof that the model's "forever on vacation" motto is slowly morphing her into a real-life mermaid.