Nicole Scherzinger is reportedly ''tired of fighting for'' her relationship with Lewis Hamilton.
The 'X Factor' judge was recently left furious after her boyfriend was caught partying with 10 girls in his hotel suite last week and is now said to have told friends she is having doubts about her future with the Formula 1 star.
A source told the Daily Mirror newspaper: ''Nicole's confiding in pals that she thinks it might be time to call it a day. It's a long distance relationship, he isn't ready to settle down and they're both working non-stop - she's tired of fighting for it and feels it just isn't working.
''Nicole is so busy at the moment with promotional activity for her music on top of her role on 'X Factor'. It's really hurt her that she has to take on a new job while feeling so humiliated. She is furious he could be so disrespectful to her - and seeing as it was only a few months ago that they vowed to make a go if things after they split last year, she doesn't know whether she can face the heartache of trying to make it work any more. She's telling her friends that she doesn't think it's worth it. She hasn't wanted to speak to him for the past few days while she mulls it over.''
Nicole was said to be ''seething'' after it emerged that Lewis partied with the bevy of beauties at London's Mayfair Hotel last week.
A source said: ''She is seething. She can't believe he would be so disrespectful to her in this way. It's not the kind of behaviour she expects from him. Lewis is in serious trouble.
''He wasn't thrilled when she accepted the 'X Factor' job so there have been massive tensions. Now things have reached crisis point.''