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Britney Spears is now in an LA hospital awaiting a mental evaluation after being taken from her house by ambulance crews.
TMZ.com reports the 26-year-old singer had to be wheeled out of her Beverly Hills mansion by paramedics and taken to the Cedars-Sinai Medical Center on a "medical hold" after police found her under the influence of an "unknown substance".
the singer was designated a "special needs" patient," meaning "they have either overdosed or tried to commit suicide," a hospital source tells.
"So we go stay with these patients and monitor them constantly," the source adds. "We watch them so they don't hurt themselves and watch the people who come visit them to make sure they don't pass anything to them."
Pagesix.com reports that she has lost a tremendous amount of weight due to "mental stress and anguish" over her ongoing custody battle for her two children with ex-husband Kevin Federline.Officers were called to the singer's home about 8pm (local time) after she reportedly refused to return custody of her two sons Sean Preston, 2, and Jayden James, 1, back over to their father's bodyguard as part of court orders.
Los Angeles Police Department spokesman Jason Lee said officers had been called to the home to deal with a "family custody dispute".
"While officers were on the scene, they observed Ms Spears under the influence of an unknown substance," Lee said.
"She is now being taken in for an evaluation to a hospital.
"There were no reported injuries to anyone involved including the children."
Lee would not confirm who made the call requesting police assistance.