Nicole Scherzinger's jealously caused The Pussycat Dolls to split, according to former member Carmit Bacher.
The 'Don't Cha' hitmakers - made up of Nicole, Carmit, Melody Thornton, Ashley Roberts, Jessica Sutta and Kimberly Wyatt - broke up in 2010 and Carmit says the main reason behind the split was Nicole's envy of Ashley and the way she looked.
She said: ''Nicole was jealous of Ashley. She felt threatened by her - like people would prefer her because of the way she looked.
''Ashley had that iconic American thing going on - blonde hair, blue eyes. It was the look Nicole seemed to want but could never have.
''No one could understand why Nicole was so jealous. She was an exotic beauty with a look that most girls would kill for.
''But she always had a thing about blonde girls. Ashley knew that Nicole was jealous of her and it made her feel uncomfortable. It was a hideous undertone in the group.''
The group got together in 2003 but Carmit says just a couple of years later, Nicole was starting to act like a diva and wanted to be the biggest star in the burlesque band.
She told The Sun newspaper: ''I think Nicole got it into her head that she was the real star and would be better off on her own.
''She started travelling in her own tour bus and the divide between her and the rest us just got bigger. Nicole chose to isolate and alienate herself. There was constant bickering. Ashley was always the sensitive one back then.
''She would often call me late at night crying her eyes out. I know Nicole's attitude got to her.
''Nicole basically wanted to be front and centre all the time. We were expected to work our asses off to boost Nicole and her own career. The situation became unbearable.''
The band reformed in 2011 but with all new members.