Britney Spears went “completely psycho” as she was rushed to L.A.’s Cedars-Sinai Thursday, a source tells Usmagazine.com
“They had to strap her down like a mental patient and she was going between laughing and hysterics,” the source adds, calling it “a total psychotic breakdown. She just went crazy.”

Another Spears pal tells Us: “I guess she has good days and bad days – it’s mental instability. All she has is to think of something sad and she goes crazy.”

After she defied court-mandated visitation hours Thursday night by refusing to turn over her two sons to ex-husband Kevin Federline, police were called to her home and later a reportedly intoxicated Spears was rushed via ambulance to L.A.’s Cedars-Sinai Medical Center.

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