The brunette party girl busted for a drug-fueled, livestreamed Manhattan hotel bash in which she brandished BB guns that looked like real pistols, causing police to crash the bash, was sentenced to 90 days in jail.

Maxine Hansen and three pals were busted at the Gramercy Park Hotel with six BB guns, as well as two glassines of heroin and a Ziploc of crystal meth, on Dec. 1.

Hansen — an adventurer who loves to travel, stay at fancy hotels and then document it all on social media — pleaded guilty to criminal possession of a controlled substance Wednesday in Manhattan Criminal Court.

Police were tipped off to the fake weaponry when a hotel staff member on Nov. 30 overheard through their hotel door someone say, “Be careful, you’re gonna shoot yourself.”

At the same time, Hansen and her friends had video up on Facebook Live showing the real-looking guns.

The 25-year-old originally faced felony possession charges for the drugs and BB guns, but a judge downgraded the charges to a misdemeanor.

The self-proclaimed “inheritance baby” faced up to a year in prison for the misdemeanor charge, but Judge Josh Hanshaft only sentenced her to a three-month term.

The party girl was arrested with co-defendants Ashley Mueller, Faris Yousef and his cousin, Bassem Yousef.

Hansen had previously told The Post she thought a show should be created called “Rikers Gone Wild” and she should be the star of it after her brief stint in jail when she was arrested.