Law enforcement sources have spoken about the craziness in Britney Spears' house - profanity, nudity, drugs and wild mood swings - last Thursday.

According to TMZ, sources say when the authorities arrived, Britney was holed up in the master bathroom with Jayden James. Officers saw Britney from the backyard holding Jayden, who did not appear to be upset.

Britney refused to come out for nearly three hours.

When she finally emerged, sources report, all she was wearing was panties. Interesting, since she often wears plenty of clothing, but no underwear.

Spears was incoherent, screaming, "What the f*%k are you doing in my house? I know who you are... I don't need your f*%king help. You will do as I say!"

Spears eventually put on a see-through nightgown. Cops wanted to cover her with a sweater, but she screamed, "Don't cover me up. I'm f*%king hot!" 

According to Sam Lutfi, Britney is so unstable, she recently bought a house in Malibu on a whim, began moving furniture in... then changed her mind.

Spears' nanny told cops that Britney would often dress up to the nines - for no reason. She would walk around the house, then change back.

Earlier that day, Spears was unworried about attending her deposition with Mark Vincent Kaplan and would not heed warnings to show up on time.

Police will testify about the insanity at Monday's custody hearing - a make or break day for Britney Spears if she ever wants to see her kids.