Lauren Sanchez celebrated her 55th birthday with the stars, joined by her A-list friends and her billionaire fiancé Jeff Bezos.

A video from the birthday party showing Bezos dancing with Sanchez's friend Lydia Kives went viral because of how tightly he held her.

The video comes after Jeff Bezos denied rumors of a $600 million wedding in Aspen between him and Lauren Sánchez.

Sánchez threw a celebrity bash for her 55th birthday, posing with friends like Katy Perry, Kelly Sawyer, Lydia Kives, Veronica Grazer and Elsa Collins.

The former TV host looked stunning in a sleek, ultra-mini leather dress alongside her fiance Bezoz for the event.

However, a video of the party circulating online shows the Amazon founder dancing with his arm around Kives, the wife of talent agent Michael Kives.

Despite Bezos and Kives appearing closer than expected, Sanchez didn't seem fazed. Later, the former journalist was seen wrapping her arms around Bezos while he was still holding Kives' waist.

Although the trio appeared to be enjoying the celebration together, social media was abuzz with reactions, with users questioning Bezos' cozy moment with another woman while Sanchez was present.

Bezos has since gone viral on X (formerly Twitter), with many wondering why he held onto Kives so tightly while he was with his fiancee.

One commenter wrote: "I'm confused. He's with his wife but he's flirting with a blonde?" Another added: "He puts his arm around another woman's waist in front of his girlfriend?"

A third joked: "When you have that much money it's not hard to find a date," while another said: "Lauren Sánchez, how do you keep women away from your billionaire boyfriend?"

While some disapproved of Bezos' behavior, others praised the Amazon founder.

"This guy spent his whole life as an ugly nerd and now he's a crazy bald king," one person wrote.

Another asked: "What other reason would you become a billionaire (apart from going to Mars?) if you weren't out of control like this?"

A source close to Bezos dismissed the internet speculation, saying in favor of Daily Mail that the billionaire and Kives are nothing more than close friends.

At the birthday party, Sánchez shared a photo of the club's glowing lights as she partied with friends, giving fans a glimpse of the star-studded celebration.

In a heartfelt caption, she expressed gratitude for the love she's received, saying birthday messages from fans "made" her day.

She wrote: "How it began—how it ended. (A few of my girls are missing from this photo.) What a truly magical evening. I've never felt more grateful or loved. Thank you to everyone who reached out and wished me a happy birthday—you made me smile day in ways I cannot describe."

She added: "Here's to another year around the sun, lit by the people who make every moment shine."

This comes after rumors of Bezos and Sánchez's upcoming wedding in Aspen spread online after reports claimed the couple planned to tie the knot the week after Christmas.

The Daily Mail reported the claim that Bezos had secured Aspen's top sushi spot Matsuhisa for a lavish $600 million ceremony on December 28.

Sources say the nuptials will follow a rehearsal dinner on December 26 or 27. However, Bezos quickly dismissed the claims, taking to X to call the story "completely false."

He told his followers: "This whole thing is completely bogus - none of this is happening. The old adage 'don't believe everything you read' is truer today than ever."

Bezos continued: "Now lies can go around the world before the truth is put on. So be careful people and don't be gullible."

"It will be interesting to see if all the media that has 'covered' and re-reported this issue is a correction when it comes and goes and doesn't happen," Bezos concluded his post.

Amid marriage rumors, Sánchez opened up about her wedding excitement, revealing during an appearance on the "Today Show" that she was gathering ideas on Pinterest.

"I have to say I have Pinterest — I'm like any other bride, so I have a Pinterest board," she admitted, sharing that she was researching wedding dress options. "I'm thinking about a dress."

In an interview from November 2023 Vogue magazine, Sánchez discussed the possibility of a destination wedding with Bezos, though nothing has been set in stone.

"We're still thinking about getting married," she said at the time. "What will it be. Will it be big? Will it be abroad? We don't know yet. We've only been engaged for five months!"