"I'm Yours" is the first single released by Jason Mraz from his third studio album We Sing. We Dance. We Steal Things. The song was originally released on a limited edition EP called Extra Credit as a demo in 2005 to promote his second studio album Mr. A–Z. It was performed in his 2004 and 2005 gigs and already became a crowd favorite before its release. "I'm Yours" was nominated for Grammy Award for Song of the Year and Best Male Pop Vocal Performance at the 51st Grammy Awards. It was also used for the Australian Seven Network's promotion of the season premiere of Packed to the Rafters.

"I'm Yours" was immensely successful in the U.S. on the Billboard charts. At 76 weeks on the Hot 100, it held the record for most weeks spent on the chart, breaking the previous record of 69 weeks set by LeAnn Rimes' song "How Do I Live" in 1998; this record has since been broken by Imagine Dragons' "Radioactive", which spent 87 weeks on the chart, and AWOLNATION's "Sail", which spent 79 weeks on the chart. As of January 2013, it is the tenth best-selling digital song of all time in the U.S., selling over 6 million downloads, and 12.2 million worldwide. It remains Mraz's biggest US hit single to date. The song was used as and 'inspiration' for the Bollywood movie Nautanki Saala song "Mera Mann Kehne Laga".

Mraz first launched the song from the La Costa Resort and Spa in Carlsbad, California, at Michele Clark's Sunset Sessions in 2008. He also sang a version on Sesame Street titled "Outdoors" and released a successful remixed version featuring Lil Wayne and Jah Cure.

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