I'm Yours - From the Casa Nova Sessions

Mraz explained that this song is "about finally giving into love and life's possibilities." When we spoke with the singer in 2014, he said it came to him very quickly - so fast that he doesn't even remember sitting down to write it. "'I'm Yours' just came out of joy," he said. "It came out of this spirited, joyful hour."

A demo version originally appeared in 2005 on a limited release bonus EP Extra Credit, which Mraz put out to promote his Mr. A-Z album.

Since the release of the 2005 demo version of the track, hundreds of fans have posted versions of themselves covering the track on YouTube. Mraz told Billboard magazine: "I never instigated any of the covers. But I can see why people are drawn to the song, and because it is about generosity, I wanted to share it."