Hollywood Hills, California – Pop star Ariana Grande has said she's a Dangerous Woman, but recently, it seemed some danger was coming for her instead.

A man believed to be a stalker showed up outside Ariana Grande's Hollywood Hills home around 2 AM on Friday and demanded to see the singer, according to TMZ.

When security asked him to leave, he allegedly pulled out a knife.

Police were called to the scene and apprehended the intruder. He has been identified as 23-year-old Aharon Brown, and is now facing a felony brandishing charge.

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It is unclear, however, if Grande was inside her home when the incident occurred, but the 28-year-old has reportedly obtained a restraining order against the perpetrator.

The singer has been keeping a bit of a low profile lately, staying away from both the MTV Video Music Awards and the Met Gala in New York.

She is gearing up to be a coach on The Voice, which premieres on NBC next week.

In May, the Positions singer quietly married real estate agent Dalton Gomez (26) in secret.