Mutya Buena insists she was betrayed by her ex-Sugababes bandmates and has threatened to "punch the face" of her replacement Amelle Berrabah.
The singer accuses former bandmates Heidi Range and Keisha Buchanan of replacing her too quickly following her departure in December 2005.
And Buena confesses she did not approve of their choice, 23-year-old Berrabah.
She tells British magazine Reveal, "I was mad. I'd asked that they wait a little while before appointing the new girl and, if possible, to choose somebody that doesn't look like me too much.
"When I saw her face in the newspaper I felt like punching it. I felt betrayed. It felt as if my time in the group had been completely erased. I invested half my life in something that I no longer had.
"Super for Amelle, she has a great job - mine. We'll see if and how she manages to fill out my role."