By the late 90s a formula had been established for a sassy, glossy, seductive girl band. The music, choreography and the look were shaped by set laws. Then along came a band who blew the formula apart and proved that a fresh attitude, a passion for music and an instinctive grasp of UK street reality could run rings round market researched midriff appeal. They were Sugababes. They still are Sugababes. But this time round the sugar's fermented.