Former Wilson Phillips star Wendy Wilson has become the first celebrity mum to call for British SUPERNANNY JO FROST's help after struggling to cope as a mother of four. The singer and her husband, rocker Dan Knutson, called in Frost to help them find a way of controlling their energetic toddlers as they looked after newborn twins. The British child expert discovered Williams and Knutson were suffering from sleep deprivation as they attempted to deal with restless babies and two young sons. Williams admits Frost gave the couple the chance to step back and make changes to life at home: "We were overwhelmed and we didn't know how to handle it." Frost, who joined the family at their California home, admits the couple desperately needed her expert guidance: "This family needed structure and routine." The celebrity version of America's Supernanny airs on Wednesday (20Feb08).