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JOHN MAYER

Jessica Simpson, Minka Kelly and Jennifer Aniston have all been spotted on his arm, but nobody has been able to capture the troubadour's heart – yet! What's Mayer's secret for attracting the ladies? "He makes you feel like you're the most beautiful woman on the planet," a source told PEOPLE. Obvious charm aside, in a recent poll, 70% of PEOPLE.com readers said they wouldn't date the musician.