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8. Olivia Newton
Olivia was already a British singing sensation before her megastar status was brought upon by her role in the movie Grease. With Grease giving her the edge she needed to penetrate the US market, Olivia made drastic changes to her singing, concentrating more on the poppy edgy feel. Her risks paid off as her album Physical went double platinum and the song Physical lasted 10 weeks top of Billboard top 100. Today Olivia still tours, focusing mostly on the American and Australian market.