Nicki Minaj -- Headlining Post-Fight Mega-Bash ... Got $10k For VIP Table?!

Nicki Minaj is cashing in on the Mayweather vs. Pacquiao fight -- headlining a HUUUGE concert after the brawl ... with VIP packages going as high as $10,000-a-pop!  TMZ Sports has learned ... Nicki -- along with Funkmaster Flex, Sevyn Streeter…

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