Police were called to Britney Spears' home in a custodial dispute that lasted for nearly three hours before the intoxicated singer reportedly turned over her children to ex-husband Kevin Federline.
Officers were called to the Los Angeles home at about 8pm (1500 AEDT) today, and the 26-year-old singer turned over the children around 10.50pm (1750 AEDT), said police spokesman Officer Jason Lee.
Aerial footage from local television stations showed Spears being lifted into an ambulance on a trolley. It was unclear where she was being taken.
Lee said Spears was under the influence of an unknown substance, and no injuries were reported.