Nicole Scherzinger was riddled with self-loathing at the height of her career.

The 'Poison' singer battled with bulimia when she was in girl group the Pussycat Dolls and says she felt like two different people because she had to constantly appear confident and sexy even though she was ''unbelievably insecure'' underneath it all.

Nicole told Britain's Grazia magazine: ''I spent 10 years - the whole time I was in the Pussycat Dolls - as two people, one on stage and then behind closed doors. I was this girl who was lost and lonely, hating myself.

''Just because you wear a corset and dance doesn't mean you think you are beautiful. I was unbelievably insecure and I couldn't control it ... My metabolism was all messed up. I was losing the one thing I only ever wanted to do: sing. I saw therapists, psychiatrists, life coaches and dealt with it head on.''

The 34-year-old pop star - who is currently in the UK for her role as a judge on 'The X Factor' - has now overcome many of her issues and feels more secure in herself than ever.

But she resents misconceptions she doesn't like to drink or have a good time and says her dream drinking buddies would be Prince William and Catherine Middleton.

Nicole enthused: ''I'm loving my 30s ... [Do I drink?] Hell yes! I have Russian blood! I haven't been out and let rip yet in London but I can drink a lot of people under the table. I've been to Essex pubs. Next is having a pint with Kate and Wills.''