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Amanda Bynes has been placed on a 5150 hold after trespassing and allegedly starting a fire on a property in Thousand Oaks, California on Monday night.

Bynes was reportedly trying to gain access to a retirement community in Thousand Oaks, and when management turned her away and called a cab, she threw a hissy fit and walked back towards the community, at which point cops were called, according to TMZ.

The fire department then responded to a home in the community around 9pm after a blaze was set in the driveway, and when TMZ spoke with the homeowner, she said she had no idea what was going on until cops came to her door. The police then told her there was a young woman in her driveway who had lit a fire and was carrying a "little red gas tank." The elderly resident said cops added that Amanda had also "burned part of her clothing." Yikes!

When sheriff's deputies arrived, they asked the 27-year-old actress what she was doing, and when she responded they determined that she needed to be placed on a 5150 hold, which is an involuntary 72-hour hospitalization for mental evaluation.

Britney Spears was placed under a 5150 in 2008 before her father was appointed co-conservator over her estate and affairs. So far no official statement from anyone representing Amanda ... but we're wondering if her parents will follow in the footsteps of Jamie Spears and try to get control over their troubled daughter's life.