PDA

Alessandra Ambrosio’s love game is strong, and she’s showing it -- the model was all about that PDA with her BF Buck Palmer during a sun-soaked beach day in Brazil.

The catwalk queen was turning up the heat in a tiny green bikini, flaunting that jaw-dropping figure and taking breaks from her beach fun to lock lips with her fashion designer beau.

Alessandra wasn’t shy about showing who’s hers ... 'cause she was all over Buck, wrapping herself around him, kissing his back, and making it crystal clear -- this man’s off the market.

Camila Cabello has made waves -- literally -- by going public with her boyfriend, Henry Junior Chalhoub, during a romantic beach day in the Caribbean waters.

The 27-year-old singer was photographed over the weekend showing off her figure in a chic brown and white bikini as she passionately kissed and frolicked in the waters of St. Barts with her wealthy businessman boyfriend.

The couple, who have been rumored to be romantically linked since November, were completely smitten as they kissed, held hands, laughed, and soaked up the sun. This marks the first time the pair has seemingly confirmed their relationship, putting an end to months of speculation.

You can kiss the year goodbye with the stars who spend their days and nights lip-locked around the clock! Take a good look at these celebs swappin' spit like nobody's business ...

Paris Jackson celebrated her engagement with music producer Justin Long with a sloppy smooch, Brittany Mahomes laid one on her man and chief, Patrick Mahomes ... and Kourtney Kardashian and Travis Barker stuck to their usual kissing routine.

Check out these love birds: Actor Matthew Lawrence must think he's fly and ain't no 'scrub', planting a sweet kiss on his boo, Chilli.

And, leaning back for a smackeroo, lovebirds Hilary Duff and baby daddy Matthew Koma took a timeout from the kiddos to show some lovin'!

Leonardo DiCaprio and Vittoria Ceretti are letting the waters of St. Barts wash all the stress away ... diving into the crystal clear ocean in barely any clothing.

The two lovebirds hit the beach Friday ... Leo in a pair of black board shorts and Vittoria in a revealing two-piece bikini leaving little to the imagination.

Leo and Vittoria swam around together ... engaging in some light PDA while treading water off the coast of the island country.

"Bachelor" alums Hannah Godwin and Dylan Barbour are turning up the heat in the Maldives, flooding our IG feeds with steamy snaps and sizzling swimsuit vibes.

Check out our gallery and see all the fun photos under the sun!

Hannah was living her best influencer life, striking all the right poses against the stunning island backdrop -- because if it’s not on the ’gram, did it even happen?

Mauricio Umansky is living up the single life in the middle of his white Christmas ... locking lips with a beautiful blonde in Aspen after a sushi dinner.

The reality television star was spotted out in the celebrity vacation destination Tuesday night ... walking out of Matsuhisa -- a popular Japanese and sushi restaurant.

At his side was a blonde woman, bundled up against the cold ... and, she clearly needed some body heat -- 'cause she burrowed right into Kyle Richards' estranged husband's chiseled frame.

NFL cornerback Sean Murphy-Bunting is setting the record straight on his dating life ... saying he's NOT the guy kissing Bobbi Althoff in a blurry video making rounds this week -- despite what some folks thought on social media.

The podcaster shared the clip to her Instagram story ... showing her kissing and being all lovey-dovey with a taller man -- but purposely leaving his face out of frame to preserve his identity.

The irresponsible X aggregators were quick to spread the misinformation ... stating as fact it was the Arizona Cardinals player on the other side of Bobbi's smooches in the footage.

Cade York isn't just winning on the football field, he's also crushing it at life ... 'cause shortly after his Cincinnati Bengals secured a victory on "Monday Night Football," he shared a kiss with his Dallas Cowboys cheerleader girlfriend!!

York and Zoe Dale went public with their relationship in June ... and coincidentally, the kicker joined the Bengals just in time for their primetime matchup against his partner's employer.

Despite being on opposing teams on Monday, the two had no love lost for each other ... even locking lips on the sideline after Cincy secured the 27-20 dub.

It's that time of year again ... All the single ladies and gents are coolin' off and are ready to chill with the idea of cuffing up with other hotties ridin' solo. There's nothing taboo if you're a party of one, however it's a PDA rager for these hot doubles!

Dynamic duos like Selena Gomez and Benny Blanco literally, couldn't 'keep their hands to themselves', Nick Jonas and Priyanka Chopra took off their pants and kept cozy in France ... and Kelly Ripa and Mark Consuelos are still hot for each other after 28 years of marriage.

Pregnant Gisele Bündchen and future baby daddy Joaquim Valente are taking full advantage of their romantic getaway down in Central America ... packing on the PDA at the beach.

The supermodel and her boyfriend kissed and hugged as they soaked up the sun in Costa Rica ... playing beach tennis and enjoying some time with her dog.

Gisele's still staying active and looking pretty fit a few months into her pregnancy ... as she prepares for her first child with the jiu-jitsu instructor.

Gisele Bündchen's shining brighter than ever -- rocking her pregnancy glow and living her best life on a dreamy Costa Rica getaway with BF Joaquim Valente.

The pregnant supermodel was strolling hand-in-hand on the beach with her jiu-jitsu boo ... pausing for a sweet kiss during their serene Thanksgiving break.

Gisele proudly flaunted her baby bump in a chic white lace cover-up over a black bikini, strolling barefoot on the sand with Joaquim.

Sam Asghari and girlfriend Brooke Irvine are getting close for Thanksgiving ... by showing off a little PDA.

The 2 were snapped getting handsy while grabbing lunch at Gracias Madre in West Hollywood on Wednesday ... then a stroll with Sam's dog.

While Sam has been coy when directly asked about Brooke ... they've been spotted a lot around L.A. -- and most recently in Vegas at a DJ Kaskade set.

Brooks Nader and Gleb Savchenko just can't keep their lips off each other ... embracing and kissing during rehearsals for their reality TV show.

The pair locked lips and hugged at the "Dancing with the Stars" finale rehearsal Monday ... and their PDA was captured on video and posted on social media.

The romantic gestures come less than two weeks after Brooks told us their hot fling was fizzling and they were never even dating to begin with.

Kelsea Ballerini and Chase Stokes are going strong and very much lovestruck, as they were spotted cuddling up during a recent outing.

TMZ has obtained video of Kelsea and Chase getting extra cozy at Morgan Wallen’s This Bar in Nashville Saturday night -- looking like they were in their own little love bubble.

Kelsea and Chase were living it up in the VIP area, before stepping up to the balcony to dance it off, where Beyoncé's "Crazy In Love" fittingly played at one point.

Ariana Grande and Ethan Slater are letting everyone get a glimpse of their mostly private relationship ... engaging in some light PDA at the NYC premiere of "Wicked" Thursday night!

The couple hit the red carpet in the Big Apple -- Ariana wearing a pink gown to match her character, Glinda, and Ethan all dressed up in a navy blue suit with a black tie.

While usually keeping some distance in public, Ariana couldn't help but wrap her arms around her man ... and he pulls her in for a tight embrace while cameras flashed.

A New York Knicks fan infiltrated a family-friendly event with some adult humor on Wednesday ... making use of his time on the kiss cam by doing something a bit, uh, different than locking lips with his significant other.

The surprising moment happened during a break in the action at the home team's matchup with the Chicago Bulls ... when the Madison Square Garden cameras focused on an apparent couple enjoying their date night.

The woman was seemingly ready to give her man a smooch ... but the dude had other plans. As she leaned in for a peck, he grabbed her head and pushed it down toward his lap -- and it doesn't take a genius to figure out the message he was trying to convey.