The English singer-songwriter, 40, rose to fame in 1998 at just 13 years old when she formed a third of the Sugababes alongside Siobhán Donaghy and Keisha Buchanan.
Taiwo Leo Atieno, 39, is accused of repeatedly assaulting the chart-topping star, banning her from wearing red lipstick, and controlling her every move, from what she ate to when she could shower.
The trio, formed of Keisha Buchanan , Mutya Buena and Siobhán Donaghy have just released their new track Jungle - marking their first single in two years.