We bet this is some SERIOUS money, b*tches!

Cardi B is laughing her Bronx butt aaallllll the way to the BANK! The singer just announced a residency at the Palms Resort & Casino in Las Vegas at the hotel's posh new nightclub KAOS. The club is amphitheater-style and functions as a day-time performance venue and a nightclub and opens in April.

And if Cardi seems like a pretty big, pretty current name to be taking on Vegas (Sin City is no longer a place where aging performers go to make bank and die) ... check out the fact that DRAKE -- yes DRAKE! -- signed a $10 million-deal to perform at the Wynn's club XS Nightclub. Wha?!

Vegas is really heating up and competition among the clubs is fierce ... and the talent is even fiercer! G-Eazy, Skrillex, Kaskade and Above & Beyond are also booked to appear exclusively at KAOS.