"I said, 'Please, let's not have a hormonal moment.' "

But Spears wasn't budging.

"She was on a mission," said Tognozzi. "She had made up her mind that she was shaving her head before she came in."

According to Tognozzi, Spears said she was tired of her hair extensions and wanted to make like Sinead O'Connor. When Tognozzi said she didn't want to be responsible for shaving Spears' hair, the singer then asked if she could do the deed herself.

"She grabbed the shears and just started shaving her head," J.T. Tognozzi said. Asked if anyone tried to intervene, he responded, "No, she wasn't there with any friends. Just a couple of bodyguards who didn't try to stop her."

"She wasn't very talkative, in fact, I kept talking to her about the kids, and I asked about her baby, hoping that I could convince her and talk her out of continuing," added Esther Tognozzi.

She said that Spears didn't appear to be under the influence of anything and remained "emotionless" for the most part, "except for when she said, 'Oh my god, my mom's going to be so upset,' and she had tears in her eyes."

Once Spears put down the clippers, Tognozzi offered to finish the job and dust the hair off.

Spears topped off the image makeover moments later by stopping at a the Body and Soul tattoo parlor in nearby Sherman Oaks to be inked with a black, white and pink cross on her lower hip and red and pink lips on her wrist.

When word got out that Spears was in the house, police were called to control the crowd and help her bodyguards get her into her SUV. A hoodie covered her as she was ushered out of Body and Soul.

Meanwhile, E! Online's Marc Malkin's reports that Spears spent Saturday afternoon poolside at the Mondrian hotel, wearing a short blonde wig.

Spears reportedly flew into L.A. from Miami early Friday, after an aborted attempt at rehab in the Caribbean.

While there has been no official word from Spears' camp on her recent antics, a source tells Malkin that Spears' mother is distraught over the singer's behavior and the family is "in major intervention mode. Her mom is constantly crying. Her family is freaking out."

For more on Britney Spears' mane event, including exclusive new details, tune to E! News at 7 p.m.

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