LATEST: Troubled pop star Britney Spears has reportedly left a rehabilitation facility in Malibu, California, less than 24 hours after checking in. This is the second time in a week that the TOXIC star has left a treatment centre after less than one day - according to news website TMZ.com, Spears left Promises Treatment Center early this morning (21FEB07). According to further media reports, Spears tried to get into a tattoo parlour before returning to her home, but the shop was closed. On Friday (16FEB07), she shaved her head bald at a hair salon and then hit the Body + Soul Tattoo parlor in Sherman Oaks, California, where she got a pink, black and white cross on her hip and pink and red lips on her wrist. She checked herself into Crossroads Centre, a treatment facility founded by musician Eric Clapton last Wednesday (14FEB07), only to check out the following day. Meanwhile, according to TMZ, the Los Angeles County Department of Children and Family Services (DCFS) has received numerous phone calls to their hotline from people concerned about the welfare of Spears' children in light of her recent bizarre behaviour. Spears is the mother to two young sons, Sean Preston, 18 months and JAYDEN JAMES, five months. The DCFS provides a 24-hour phone number for any resident in the Los Angeles area to report or discuss any issue regarding children.