Britney Spears gets whisked away.

BRITNEY SPEARS has now turned over her two children, SEAN PRESTON and JAYDEN JAMES, to their father KEVIN FEDERLINE.

LAPD officer JASON LEE has confirmed that she is "being taken into custody for being under the influence of an unknown substance for evaluation" and will more than likely be taken to the hospital.

You can check out actual footage of the scene on KCAL/KCBS.

As we reported earlier, the Los Angeles Police Department was called to the Britney's Beverly Hills home on Thursday evening. Sources said that several ambulances and a fire truck were on the scene.

Officer Jason Lee noted the call involved a "family custodial dispute that we are trying to resolve...peacefully by court order."