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Paris Hilton and River Viiperi attended a private yacht party in Cannes on Monday night, and the heiress looked smokin' hot in a low cut leopard-print dress. And her model beau looked pretty dapper too ... such a beautiful couple!

Paris and River recently celebrated their one-year anniversary, and last week at the Gotha Club in Cannes, patrons reported that the lovebirds couldn't keep their hands off of each other as they danced the night away.

On May 18 River tweeted a pic of his lady love and wrote, "Happy one-year anniversary to the gorgeous, beautiful, perfect, most amazing and most caring girl on this planet," and referred to Hilton as "my girlfriend, my future wife, my life." Awww!

Earlier this month Paris told Wendy Williams that she was hoping to settle down and start a family with Viiperi. "I think that's the meaning of life to have children and have a family one day," she said. "I am so in love. I feel so lucky to have met him. He's one of the kindest, most loyal men I've ever met in my entire life, and he treats me like a princess."

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They clean up nice!

Paris Hilton And River Viiperi looked simply glamorous while experiencing a taste of the night life in Cannes, France over the weekend.

The 32-year-old socialite attended the famed film festival to promote The Bling Ring with her model beau in tow while also seeing what the vibrant city had to offer.

Looks like they're doing it up!

Paris Hilton and boyfriend River Viiperi attended the after party for The Bling Ring in Cannes last night, and it looks like the heiress really hit it off with it girl Cara Delevingne!

P tweeted, "I loved The @BlingRingMovie! Sofia Coppola is such a talented director. @EmWatson and the rest of the cast were amazing! #AMustSeeFilm," and later she posted the pic below and wrote, "Met one of my idols tonight at The @BlingRingMovie after party. The amazing Christian Louboutin! #Legend #Icon #RedBottoms."

Paris Hilton and beau River Viiperi arrived at LAX yesterday to jet off to the Cannes Film Festival, and the heiress had nothing but praise for Angelina Jolie after her recent admission she underwent a preventive double mastectomy.

"I think she's very brave and it's definitely going to save a lot of other women's lives," the blonde beauty said when asked about the star's recent surgery.

So have the headlines motivated Princess P to get checked herself?

"Definitely. It runs in my family as well. I lost my grandmother to it, so I'm going to get checked," she added.

We're glad Saint Angelina has inspired the socialite to be proactive about her health!

Paris Hilton stopped by the Anastasia Beverly Hills Salon on Tuesday afternoon before jetting off to France, and the heiress later tweeted, "Finally finished packing. Now rushing to the airport with @RiverViiperi. Looking forward to our trip to Cannes together."

In other news, P and her beau are expecting a new addition to their family, and no, she's not preggers -- they're getting a puppy together! River tweeted a shot of the adorable pooch the other day and wrote, "It's my loves @ParisHilton & my first dog together. For all those concerned he is a Puppy from a rescue couple of min pins!" Can't wait to see more of the little critter!

We're loving this blue wrap dress on Paris Hilton! And she certainly made a speedy recovery after getting her wisdom teeth yanked out a few days ago...

On Monday afternoon X17 photographers snapped the heiress leaving a business meeting, and she later tweeted, "Shopping and running around Beverly Hills getting ready for my trip to Cannes tomorrow. Can't wait! I love the South of France."

Paris and beau River Viiperi have done quite a bit of jet setting lately ... earlier this month the two were in Atlantic City and prior to that they spent a few days in Colombia, where P opened a handbag store and spent time at a local children's hospital. Quite the busy bee!

Paris Hilton and beau River Viiperi lunched at the Ivy in West Hollywood on Tuesday afternoon, and the heiress got all glammed up for their day date. Paris tweeted, "Another beautiful day in LA. I love this city!" Good thing the morning rain went away, because we have a feeling P probably wouldn't have been wearing a dress and pumps!

The two recently went to Colombia where Paris opened a handbag store, and she also spent time visiting with kids at a local hospital. P and her main squeeze were in Atlantic City last weekend, and we know the heiress loves being at home with her man and her pets, but you know she appreciates a good vacay too! Wonder where she's off to next?

Then again, they're always smiling when we snap their picture!

On Sunday night Paris Hilton and her boyfriend River Viiperi returned home from a promotional appearance at the Pool After Dark at Harrah's Resort in Atlantic City, and P tweeted, "Just landed back in LA! Can't wait to get home to my pets! #HomeSweetHome."

Paris appeared on The Wendy Williams Show last week, and she chatted about how she's changed over the last few years. "I'm staying out of trouble," the heiress said. "I've grown up." When asked about River, P gushed, "I am so in love ... He's one of the kindest, most loyal men I've ever met in my life. He treats me like a princess." Awww!