Carey's team insist infidelity and her excessive spending were not a factor

His camp have branded accusations about his

She split from her billionaire fiancé James Packer following a dramatic fight in September.

But Mariah Carey was still wearing her $10million engagement ring when she stepped out for dinner at celebrity hotspot Nobu in Malibu on Thursday evening.

The 46-year-old singer showed off the bling as she enjoyed a catch up with friends - including her choreographer and backing dancer Bryan Tanaka, who Packer was allegedly 'jealous' of.

Mariah is said to be planning on keeping the love token - and if the latest reports are to be believed, that's not all she wants.

Can't Let Go! Mariah Carey was still wearing her engagement ring when she stepped out for dinner at celebrity hotspot Nobu in Malibu on Thursday evening, enjoying a catch up with friends

Romance: The seemingly unlikely couple first set tongues wagging in June last year when images emerged of them holding hands strolling around the romantic island of Capri in Italy

According to TMZ, she is insisting upon a $50million pay off from Packer.

Mariah is said to think he owes her for uprooting her two children from New York to Los Angeles, so Packer could be near his own children.

The report claims Packer also made financial promises to Mariah during their romance, which she wants him to fulfil.

Then there is the cancellation of the South American leg of her tour, which Mariah's camp are blaming on the trauma of the 'dramatic fight' on a yacht in Greece which ended their relationship.

Bling: The 46-year-old singer's $10 million rock was hard to miss, perhaps hinting that she's not ready to turn her back on her romance with billionaire James Packer

Statement: The 35-carat blinder is the size of singer Beyonce and TV reality star Kim Kardashian’s engagement rocks combined

Mariah previously blamed the cancellation on promoters, writing on Twitter last week: 'Devastated my shows in Chile, Argentina & Brazil had to be cancelled. My fans deserve better than how some of these promoters treated them (sic).'

Not that Mariah was letting the stress of her break-up show on Thursday night, as she partied with her closest pals - including dancer Bryan.

Bryan is reported to be at the centre of the break-up, with James reportedly using his status to get him 'banned from Caesar's Palace', where the songstress has a residency.

For her night out Mariah was putting on a lot of front in a cleavage-baring bralet, making sure she stood out from the crowd in her racy look.

Daring to bare: Mariah's ensemble also didn't go unnoticed since the superstar was putting on a lot of front in a cleavage-baring bralet

The itsy bitsy, lace-up number barely contained her curves and definitely ensured she made an impact on her night out.

Mariah also wore a long-sleeved black jacket, teamed with bold red leather trousers that hugged her hips.

The Hero hitmaker pulled the risqué look together with a pair of towering heels in a similar lace-up style.

Wearing her hair down in loose waves and accessorising with large silver hoop earrings, Mariah ensured she was perfectly put together from head-to-toe.

Centre of attention: Mariah made an impact on her night out in a pair of bright red trousers

The pop diva seemed in great spirits following her sushi experience, showing no sign of heartbreak.

Seemingly intent on showing James what he was missing, the star looked carefree and happy as she left the venue with her entourage.

DailyMail.com has contacted representatives of both parties seeking comment on the latest revelations.

Quite the crowd: The pop princess was surrounded by several burly security guards

Cheerful demeanour: The pop diva seemed in great spirits following her sushi experience, showing no sign of heartbreak

Bone of contention: James allegedly thought Mariah was getting 'too close' to choreographer and dancer Bryan Tanaka, pictured with the songstress on August 3

It has become a very messy and dramatic end to the love story between the 46-year-old singer and the 48-year-old businessman.

The couple have not seen each other in over a month after a fight while on a romantic European vacation, her spokesperson has said.

The pair's engagement unraveled during a stay on a luxury yacht in Greece in September.

A smile for the camera: Carey, 46, and Packer, 48, had a 'huge fight' while on vacation in Greece last month and they have not seen each other since, it's claimed

TMZ reported Packer allegedly did 'something really bad' that involved Carey's assistant and there are other allegations about his behavior.

Her spokesperson denied speculation the split was over infidelity and insists the 46-year-old singer's excessive spending was not to blame.

'Mariah and James had a fight in Greece, and have not seen each other since. The fight was not because of any cheating allegations or excessive spending by Mariah,' her spokesperson told ET exclusively.

Bottoms up! Mariah spent plenty of time with back-up dancer Brian on tour, but it has been claimed that James was worried about how close the pair were getting

Speak of the devil! Mariah and Brian were spotted together at a Halloween party on Saturday - which the starlet attended without her fiance

'James is one of the most successful businessmen in the world. They are trying to work it out, the spokesperson continued.

'Right now, they're not sure if they will stay together. They are discussing it, and plan to release an official statement together about their future.'

Allegations made about Packer's conduct on their Greece trip have branded 'simply untrue' by his camp.

Packer was noticeably absent from the Vision Of Love hitmaker's Halloween party over the weekend, where the star was seen posing for photos with her ex-husband Nick Cannon and their twins.

Tense: The pair were on a romantic trip to Mykonos, Greece, in September but their relationship apparently unraveled after a row

The final trip: Mariah's entourage joined her on the European vacation

The break-up puts the producers of the singer's upcoming show Mariah's World in an awkward spot.

The show focuses on Mariah, but her relationship with Packer formed a major storyline.

The New York Daily News reported that producers were' freaking out' over the development.

A source also told UsWeekly Carey felt her fiance wasn't 'present' enough for her.

'James has not been present for her so she unfortunately couldn't make it work and had to leave him,' an insider said.

The split was first reported by Woman's Day's in Australia, with a family friend revealing: 'It's all over.'

No sign of Packer: The billionaire did not attend the star's Halloween party over the weekend, where she was seen posing with ex-husband Nick Cannon and their twins

The seemingly unlikely couple first set tongues wagging in June last year when images emerged of them holding hands strolling around the romantic island of Capri in Italy.

The pair then became engaged in January after a whirlwind romance.

The duo remained coy on the details of their impending nuptials, but Mariah did suggest that the wedding would be a low-key event rather than an ostentatious affair.