Amanda Bynes'
bizarre behavior has finally caught up with her.

The 27-year-old actress was hospitalized on a 5150 hold Monday after setting a small fire on the driveway of a random residence in Thousand Oaks, CA. TMZ broke the story.

The sheriff's deputies that responded to the scene questioned Amanda -- and based upon her answers -- determined she needed to be placed on a 5150 hold -- an involuntary hospitalization for mental evaluation. She can be held for up to three days.

This is the latest in a string of odd incidents involving the former child star.

Last Thursday, Amanda was reportedly kicked out of the Ritz-Carlton in New York City after allegedly smoking marijuana in her hotel room and insulting a front desk attendant.

Earlier last week, she donned a teal wig to court on charges she through a bong out of the window of her New York City apartment. She's also taken to Twitter to post odd "selfies" and attack everyone from Miley Cyrus to the Obamas.

Click on the "Launch Gallery" above to see candid photos of Amanda Bynes.

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