It's one of the most heartwarming songs of the year, by one of the hottest new bands of the year. 'If I Die Young' quickly became a smash hit for the Band Perry, the singing siblings from Mobile, Ala., whose debut CD was released last week.

"'If I Die Young' is actually the first song that we had penned for the album," Kimberly Perry tells The Boot. "It defines an early chapter of our music career. We penned it on a cloudy day in East Tennessee, which is where we live and do all of our best thinking. We wanted to write a song about making the most of whatever time you're given -- whether it's two years, twenty years or two hundred.

"We really have gotten to live and love at our young ages. 'If I Die Young,' for us, is about if it all ends at this moment, look at what we've gotten to do. Whatever time we're given will be absolutely enough as long as we make the most of it."

The Band Perry -- Kimberly and brothers Neil and Reid -- filmed an exclusive live performance of 'If I Die Young' at Nashville's Oceanway Studios. Watch the video below.

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"It's been really cool on all of our Facebook pages," Kimberly says of fan feedback on the poignant song. "We've had people writing in and telling us about what this song means to them. People are finding a lot of life through this song. That's the spirit that we wrote it out of. That makes us so excited."