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#20 Robert Pattinson
Robert Pattinson is 16% as popular as Justin Bieber
Trend analysis: True Harry Potter fans recognize Robert Pattinson as Cedric, but most people know him as the star of Twilight, Edward Cullen.
His search traffic on Google peaked at the end of June/July of 2010 when the third Twilight movie came out.
Note: We searched for "pattinson," which turns up almost entirely hits for Robert Pattinson.