Mariah Carey Oh, This Little Thing?

1/29/2016 6:24 AM PST BY TMZ STAFF

0129-mariah-carey-getty-01Mariah Carey flashed her giant engagement sparkler Thursday night in L.A.  for all to see.

The black tie event was the first time Mariah and James Packer were photographed together since he popped the question.

In case you're wondering ... 35 carats and more than the rest of us will make in our lives.

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