More Details From the Britney Spears Saga

If you thought this couldn't get weirder, you don't read enough Britney Spears news. But even we'll admit that this developing story is beyond bizarre.

After being taken from her home, sources inside UCLA Medical Center say Britney Spears checked into the facility this morning using an alias.

The sources say Britney said she was on Adderall, a stimulant used to treat Attention Deficit Disorder, and was taking up to 10 laxatives a day.

While Spears was described as "calm" this time (unlike January 3), for a time she was hurling profanities at her parents and staff.

When she was admitted, Britney accused her mom, Lynne Spears of "sleeping with my boyfriend." She wasn't specific on who she was referring to.

Adnan Ghalib? Sam Lutfi? Robbie Carrico? One can only guess.

TMZ also reports Britney's parents have made progress in the tug of war with Sam Lutfi over who's calling the shots when it comes to Brit's treatment.

UCLA is "fully cooperating" with Lynne and Jamie Spears in the treatment of Britney, however, a judge must still an order as to who has control.

Britney Spears - shown here arguing with Sam Lutfi this week - has been spiraling downward for months. Her family has worked hard to get her into treatment.

Also, Us Weekly reports that Britney Spears' inner circle chose to admit her to UCLA Medical Center because of its experience in treating bipolar disorder.

"Her lawyers and doctors were working with UCLA," a source cited by the celebrity news site says. "They were ready and had everything in place."

The facility is better prepared to treat the troubled singer than L.A.'s Cedars-Sinai Medical Center, where she was hospitalized January 3-4.

"When she went to Cedars-Sinai they weren't ready for her," a source says.

"They have a much stricter unit at UCLA Medical Center and treat bipolar cases regularly. This is a serious unit she's on."

Britney Spears, who sources report has not slept in days, is under a "mental health evaluation hold" - commonly known as a "5150" - meaning she can be held for up to 72 hours if professionals deem her a danger to herself or others.

After those 72 hours of treatment, a patient's family can seek a 14-day extended evaluation or the patient himself/herself can decide to seek further treatment, according to the California Department of Mental Health.