The N'Sync star - who is rumoured to be going out with actress Cameron Diaz - leapt 46 places from last year to top the survey.
The highest new entry was Irish badboy actor Colin Farrell, who's been linked to Justin's ex Britney in the past.
Rings and Pirates Of The Caribbean star Orlando Bloom was at number 15, with Michael Owen at 19 and Darius at 20.
Unsexiest chosen too!
The mag also asked for the unsexiest male too, and saw Michael Jackson top that list, ahead of Aussie actor Russell Crowe.
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