"Pussycat" was a Dutch country and pop music group driven by the three Kowalczyk sisters: Tonny, Betty and Marianne. Other members of the band were Lou Wille, Tonny's husband, Theo Wetzels, Theo Coumans and John Theunissen. The three girls had been telephone operators in Limburg while John and the two Theos were in a group called Scum. Lou Wille played in a group called "Ricky Rendall and His Centurions" until he married Tonny and created the group "Sweet Reaction" that eventually became 'Pussycat'