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Mariah Carey looks glamorous while hitting the carpet at 1OAK Nightclub at the Mirage Hotel & Casino on Saturday night (July 25) in Las Vegas.

The 45-year-old singer was seen wearing her new 18-karat yellow heart-shaped diamond necklace, which was reportedly a $500,000 gift from her new boyfriend James Packer, according to TMZ.

PHOTOS: Check out the latest pics of Mariah Carey

Mariah was celebrating her final weekend of concerts in Las Vegas until she picks the run back up in February.

FYI: Mariah is wearing a Camille Flawless dress.

30+ pictures inside of Mariah Carey attending the event… More Here! »

Mariah Carey and her boyfriend James Packer hold hands while taking a stroll on the beach together on Wednesday (July 1) in Ibiza, Spain.

The superstar has been soaking up the sun for a few weeks on vacation with her billionaire beau and her kids Moroccan and Monroe (not pictured).

PHOTOS: Check out the latest pics of Mariah Carey

The day before, Mariah showed off her bikini body on her boyfriend’s yacht while surrounded by some pals.

20+ pictures inside of Mariah Carey and James Packer on the beach together…More Here! »

Mariah Carey lounges in her bikini while taking in the sights on a yacht on Tuesday (June 30) in Ibiza, Spain.

The superstar was joined by her boyfriend James Packer on the yacht, as well as her kids Moroccan and Monroe (not pictured), and some additional friends.

PHOTOS: Check out the latest pics of Mariah Carey

Mariah and James recently visited Jerusalem with her kiddos and, according to People, “are enjoying spending time with each other.”

15+ pictures inside of Mariah Carey lounging on the yacht in Spain…More Here! »

Mariah Carey shows some cleavage while enjoying the beautiful sights on Friday (June 26) in Portofino, Italy.

The 45-year-old singer was seen holding hands with her new beau James Packer during the outing.

PHOTOS: Check out the latest pics of Mariah Carey

“[Mariah]‘s having a lot of fun being courted. It’s very different than when Nick Cannon was wooing her. To her, Nick [Cannon] was a boy. James is a man,” a close source recently shared about Mariah and James.

25+ pictures inside of Mariah Carey and James Packer spending time together…More Here! »

Mariah Carey dons a colorful dress while doing some retail therapy on La Croisette on Thursday (June 25) in Cannes, France.

Earlier in the day, the 45-year-old entertainer was seen spending time with her new beau James Packer on his yacht.

PHOTOS: Check out the latest pics of Mariah Carey

“They are not talking marriage. That’s ridiculous. She’s enjoying his company, but she’s also trying to remain cautious. This trip is a chance for her to really get to know him. She hasn’t 100 percent let him in yet,” a close source to Mariah recently shared to E! News.

35+ pictures inside of Mariah Carey and James Packer enjoying each other’s company on a yacht…More Here! »

Mariah Carey chats up a male pal while soaking up some sun on her new beau James Packer‘s yacht on Wednesday afternoon (June 24) in Cannes, France.

The 45-year-old entertainer sipped champagne and snapped some photos while on board the 47-year-old Australian businessman’s boat.

PHOTOS: Check out the latest pics of Mariah Carey

The day before, Mariah and James were spotted hanging out with some more friends on the yacht as it cruised around the French Riviera.

35+ pictures inside of Mariah Carey and James Packer in Cannes…More Here! »

Mariah Carey looks smitten by her new boyfriend James Packer while spending a romantic day together on Friday (June 19) in Capri, Italy.

The 45-year-old entertainer reportedly met James through their mutual friend Brett Ratner, according to TMZ.

Mariah and James are staying on his yacht for an extended vacation and they are rumored to be visiting Cannes and St. Tropez next.

James, 47, is a billionaire mogul worth $4.6 billion. He made his money through a media company that he sold and now he owns hotels and casinos in Australia and other places.

Check out recent pics of the couple together on vacation below!More Here! »