Colbie Caillat's 'I Do' is a three minute upbeat acoustic jam -- just in time for spring. In this smiley pop-tastic single, Caillat explains that she was never the "walk down the aisle' girl, but this guy makes her want to say 'I do.'"

'I Do' -- the latest single from the 'Bubbly' singer -- was released just this week, as the lead single for her third studio album, 'All for You.'

Caillat lays it all on the line in this one, as she makes it clear that she's found the man she wants to settle down with. She sets the tone immediately in the opening verse:

"It's always been about me, myself, and I / I thought relationships were nothing but a waste of time / I never wanted to be anybody's other half / I was happy saying I had a love that wouldn't last / That was the only way I knew 'til I met you."

The song continues through the couple's relationship and into their old age, when Caillat recants: "When I'm 80 years old I'm sitting next to you, we'll remember when we said 'I do.'"

'All for You' is set for release on May 3, 2011.

Listen to Colbie Caillat, 'I Do'

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