Carey, 48, put on a busty display as she went to the star studded bash at the 'The Reserve' nightclub on Saturday evening in Los Angeles.
Carey wore a skintight plunging black mini dress showing off her famous ample assets. RadarOnline.com reported how she has lost over 30lbs.
The 'Hero' singer seemed in good spirits at the bash as she mingled with the guests and danced with her boyfriend.
They started dating shortly after Carey split from billionaire James Packer in 2016, Tanaka had been a backing dancer for the singer.
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