<Table> <Tr> <Td> </Td> <Td> This section needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (March 2017) (Learn how and when to remove this template message) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This section needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (March 2017) (Learn how and when to remove this template message) </Td> </Tr> <P> The lyrics of "Half of My Heart" are sung by both Mayer and Swift; Swift sings with Mayer in the chorus and in the song's bridge . The lyrics are about the duo, with half of their hearts saying they should continue to love each other, although the other half says they are not each other's true love, and cannot keep loving each other . </P> <P> Mayer "tweeted" about wanting to record the song with Swift in March 2009: "Waking up to this song idea that won't leave my head . 3 days straight now . That means it's good enough to finish," he wrote . "It's called' Half of My Heart' and I want to sing it with Taylor Swift . She would make a killer Stevie Nicks in contrast to my Tom Petty of a song ." </P>

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