FIRST LOOK: John Mayer Jilts a Bride in 'Half of My Heart' Check out a sneak peek of the singer's latest music video. By People Staff. Published on June 1, 2010 08:00AM EDT.

When did Taylor Swift and John Mayer date? Swift and Mayer dated from 2009 to 2010 after collaborating on ‘Half of My Heart.’ At the time, Swift was 19 years old and Mayer was 32 years old.

This article was originally on a blog post platform and may be missing photos, graphics or links. See About archive blog posts. In his song ‘Half of My Heart’ John Mayer sings, ‘Half of my ...

Taylor Swift's Speak Now and Midnights feature songs that fans think are about her ex John Mayer, ... They first met when they collaborated on his song "Half of My Heart." Swift was 19; Mayer was 32.

After collaborating with Taylor on the song, 'Half of My Heart," for his latest album, 'Battle Studies,' John says he now considers Taylor a friend. And like any good friend, John wants to offer a ...

Mayer and Swift never publicly confirmed their romance, but the two did perform together a handful of times in 2009 after collaborating on Mayer's song "Half of my Heart." ...

Singer John Mayer has more than 135,000 followers on Twitter, ... It's called 'Half of My Heart' and I want to sing it with Taylor Swift. She would make a killer [Stevie] ...

John Mayer performed his 2009 hit “Half of My Heart” at a recent concert, and fans are shocked. Why? It’s been long, long time since he last played it for an audience, maybe or maybe not due ...

John Mayer sang his duet with Taylor Swift, "Half of My Heart" at a recent concert. Watch clips.