It's alleged Packer had Carey's choreographer and dancer Bryan Tanaka 'banned' from Caesar's Palace

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

His camp have branded accusations about his

James Packer was 'jealous' of Mariah Carey's backup dancer and choreographer Bryan Tanaka, a new report claims in the wake of the news of the celebrity couple's dramatic split.

TMZ claimed Thursday night that 'sources connected with Mariah' had revealed the tension between the Australian billionaire and Tanaka that led to a showdown last June.

The website claims that following a loud argument between the two men, 'Packer used his casino ties to get Tanaka banned from Caesar's Palace', where the songstress has a residency.

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

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

It has become a very messy and dramatic end to the love story between the 46-year-old songstress 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 has 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 husband

'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

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.'

The publication also claimed that the tycoon has allowed her to keep her $10m diamond engagement ring.

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

Kicked out: It's been claimed that James used his 'casino ties to get Tanaka (R) banned from Caesar's Palace', where the songstress has a residency - pictured with Mariah and DJ Suss (L)

Just friends: Mariah's spokesperson has denied speculation the split was over infidelity

Three of a kind: Mariah seemed in great spirits earlier this year as she partied with Bryan and DJ Suss whilst clad in a plunging black gown with sexy fishnet panels

The pair became engaged in January after a whirlwind romance of less than a year.

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.

'I can't really talk about them right now because everything is still being figured out,' she teased, noting, 'I never said it was gonna be a big wedding', she told People magazine, earlier this year.

'Trying to work it out': Carey's spokesperson revealed the couple are 'not sure if they will stay together' right now. The songstress is pictured still wearing her engagement ring on Friday

Keeping the rock? It's claimed that the business tycoon has allowed Mariah to keep her $10m diamond engagement ring

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 news of their split comes after Mariah announced the cancellation of most of her South American tour, earlier this week.

The Hero songstress revealed she was 'devastated' at the outcome and took to Twitter on Tuesday to share a link to her official statement to E! News.

'To all of my lambs in South America, I am devastated that a portion of this tour had to be cancelled. Thank you for all of the excitement and love - I hope to see you soon, my darlings!' she said.

Mariah also shared an impassioned message on Twitter, writing: 'Devastated my shows in Chile, Argentina & Brazil had to be cancelled. My fans deserve better than how some of these promoters treated them (sic).'