The Pussycat Dolls singer - who is renowned for her stunning slender figure - has tried a number of different strict eating plans but is unable to restrain her urges to eat calorific treats once she relaxes her food rules. She said: "I`ve tried every diet out there and they don`t work, because eventually the diet ends and I want the foods that I restrain myself from eating. "It`s about having everything in moderation as long as you`re staying active. I also try not to eat late at night, not after 7pm if I can help it." Nicole - who was born in Hawaii and also lived in the US from the age of six - also said she found it difficult being a part of raunchy pop group Pussycat Dolls and wearing revealing outfits because of her strict upbringing. She explained: "I come from a Catholic background that was very conservative, so I wasn`t comfortable showing off my body and was very self conscious about myself. But I learned to deal with that. "I was much harder on myself when I was younger and that`s changed now that I`ve matured."