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The most famous teens stars were the Harry Potter stars, but as only one of them is still a teenager, you can't really count them. Most people would say Demi Lovato, Miley Cyrus or Justin Bieber- but no people outside of 25 years old have heard of these people so they can't be counted. It depends what audience you ask- but i would probably have to say either Emma Waston or Miley Cyrus. Justin Bieber is just a phase and no one will remember him in 10 years time. And Demi is actually not that famous outside of America.

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15y ago

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