Mariah Carey My 'Auld Lang Syne' Will Cost You Millions!!!

If Mariah Carey's New Year's resolution is to make more money in 2016, she's gonna be starting the new year off right.

We're told Carey just signed a multi-million dollar deal for a one-off NYE performance at Copacabana in Brazil.

Our sources wouldn't divulge the exact number Mariah's getting, but we're told it's between $2 and $5 million FOR ONE NIGHT OF WORK!!!

It's an obscene amount ... until you consider the millions she got for her Las Vegas residency.

Wonder how much she's getting for the Hallmark feature film she's directing ... our guess is Hallmark's got deep pockets.