Actress Mischa Barton looks like a bloated shell of herself in these shocking new photographs obtained by RadarOnline.com.

See more shocking photos of Mischa Barton - one day before her meltdown!

The photos were taken Tuesday, just one day before the OC actress was placed under an involuntary psychiatric hold at Cedars-Sinai Medical Center in Los Angeles -- ala Britney Spears -- by the Los Angeles Police Department.

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• Cedar-Sinai Medical Center
• Mischa Barton