The 32-year-old former Pussycat Doll said that she ended up in tears when Colgate refused to cast her for an advert.
She told The Sun, 'I missed out on a couple of big movies when I was on the audition trail early in my career.
'I got really close but didn't ever get the big job.
'For TV stuff I auditioned for this Colgate commercial once. I was really desperate for the job.
'They didn't cast me as the dancing toothbrush and I would have been spectacular.
'The thing is I could have used that money at that time.
'I was struggling and I tried so hard for the job. They were teaching us this choreography for the dancing toothbrush and just turned to me and said, 'No'. It was crushing.
'But I just felt at that moment I was going to prove them wrong. One day they would see I was SO that dancing toothbrush - and so much more.
'I could have been the best dancing toothbrush ever.'