John Mayer
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Taylor Swift's Boyfriends: Ex-BFs, Rumoured Romances... And A Bit Of Wishful Thinking!

5. John Mayer
One of the most talked about celebrity romances of 2009 was between Taylor Swift and 'Your Body Is A Wonderland' singer John Mayer, with the two stepping out at several public events together before their split in 2010, even recording a duet together on John's song 'Half Of My Heart'. The song 'Dear John' from Taylor's album 'Speak Now' was widely reported to be about the popular US singer-songwriter.