BRITNEY SPEARS stunned shoppers and staff at a Victoria's Secret lingerie shop last week (04JUNE06), when she changed her son's nappy on the store's dirty floor. The TOXIC singer was shopping at the shop in Mission Viejo, California, on 4 June (06), where she purchased some pink g-stings with eight-month-old son Sean Preston in tow. The tot needed to have his nappy changed and the 24-year-old plopped him down on the floor next to the cash register. A shocked sales associate recalls, "We don't have the cleanest floors. She just put him down and changed his diaper and then handed it to a sales clerk saying, 'Can you throw this away for us?' "We told her that we couldn't put that in our trash." Spears' parenting skills have been questioned several times this year (06) - in February she received a visit from the Department of Children and Family Services (DCFS) after she was photographed driving with her son seated on her lap. In April (06), Sean Preston was briefly admitted to hospital after he fell from a faulty high-chair while in the care of his former nanny, and last month (MAY06) Spears defended herself again after the baby was spotted slumped in the back of her car.