Man Arrested Outside Ariana Grande's Home for Pulling Knife - TMZ

A man was arrested after showing up at Ariana Grande's Hollywood Hills home in the middle of the night, then flashing a knife when security tried to get him to leave.

23-year-old Aaron Brown's facing a felony brandishing charge for the incident, which our law enforcement sources tell us went down around 2 AM Friday on Ariana's property.

We're told Brown arrived and demanded to see the singer, and when security told him to beat it ...