New details are emerging in the split between Mariah Carey and James Packer.

On Thursday it was revealed that the couple ended their relationship after about a year and a half together. Carey and Packer first met at a movie premiere in Aspen, Colo. in 2014 and Packer proposed in Jan. 2016 with a 35-carat diamond ring that was "so heavy" Carey couldn't lift her arm up.

After news of their split broke, E! News learned from a source close to the couple the reason why Carey "had to leave" Packer and how his behavior played a role in their split.

Plus we have the details on Mariah's "close relationship" with one of her dancers that developed amid problems with Packer.

Take a look at the E! News video above to get the scoop on the couple's split and find out everything we know about the dancer at the center of Carey and Packer's breakup!

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