The "Super Bass" singer donned black pasties, fishnet tights, handcuffs and almost nothing else while dressing up as a cop on Thursday night.
"Officer Minaj. Who wants to get cuffed?" she wrote on her very revealing Instagram pic.
It doesn't have to be Halloween for Nicki to put on pasties. Earlier this month, she shared a shot of herself in leopard print star pasties for no reason.
While Nicki went as a police officer, some celebrities decided to dress up as the rapper, like Ellen DeGeneres.
The talk show host sported a long blonde wig and bared some serious (fake) cleavage for her costume, saying: "This Halloween, I'm putting the 'boo' in boobs."
At least Nicki can laugh at herself. She replied to Ellen's outfit, saying: "I didn't know Ellen could get any sexier" with a thumbs up icon!
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Gallery | Celebs Love Halloween