America’s sweetheart Taylor Swift lends her singing chops to backup John Mayer in his new single “Half of My Heart” from the upcoming album Battle Studies.

This isn’t the first time the two have hooked up. Mayer shocked the crowd at Swift’s Los Angeles concert back in May to sing “Your Body Is A Wonderland” with the 19-year-old country singer.

Check out their new tune below:

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John Mayer - Waiting On The World To Change

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John Mayer - Half Of My Heart

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John Mayer - Who Says

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