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Ariana Grande
Ariana Grande's Hollywood Hills home became the scene of a police stand-off early on Friday when a man showed up with a knife and demanded to see the newly-married singer.
Security staff asked 23-year-old Aaron Brown to leave and then called the cops when he didn't.
He is now facing a felony brandishing charge.
It's not clear if Ariana was home at the time.
TMZ sources claim the 7 Rings star has been granted a temporary restraining order against Brown ahead of an upcoming hearing.