After Britney Spears spent Saturday night with her boys Sean Preston and Jayden at her Los Angeles home, the singer wasn’t happy after the kids were picked up the next morning. “Britney was very upset after the kids left,” a source tells Usmagazine.com. “She now does not know when she will get them next for an overnight. She complains it could be next week, or it could be three months.” A hearing last Tuesday saw Britney be granted overnight privileges with the children. The full story at usmagazine.com has since been removed.