LATEST: Britney Spears' latest rehab check-in came just hours after a bizarre encounter between the pop star and photographers outside her estranged husband Kevin Federline's home. Spears' mother LYNNE reportedly drove her troubled daughter to Malibu, California treatment centre Promises late last night (21FEB07) - after the singer made an effort to see her sons, who were in estranged husband KEVIN FEDERLINE's care. Spears reportedly went to Federline's house earlier in the evening, but the rapper refused to let her inside. A visibly frustrated Spears then turned on paparazzi outside the home, attacking them and hitting their cameras before driving off. Spears and her mother were spotted checking in to Promises at about 10.30pm last night.