Brit's Kids Are Safe, She's Under the Influence!
1/4/2008 4:26 AM PT
TMZ has learned Sean Preston and Jayden James were returned to K-Fed tonight just before 11:00 PM PT.
We're told that while cops were at the troubled pop star's home, they discovered Spears "under the influence of an unknown substance."
Several ambulances have been called to the scene.
