When The Boot asked Kevin Costner about 'Backyard' -- one of our favorite songs on his debut album with his band, Modern West -- the actor/musician broke the news to us that it's NASCAR's favorite, too.

"NASCAR just bought that song," Costner told us. "We got a call and they said, 'We just love this song. Can we put it on our documentary?'"

The song, also featured on the soundtrack to Costner's movie, 'Swing Vote,' is about people who leave their 'fixer-uppers' in their yards.

"I think all neighbors hate the people that have their cars out in the yard," Costner told us of his inspiration for the song. "You're thinking, 'This guy's never gonna get this piece of s--- running.' [laughs] But it just needs a fan belt!"

There's no word yet on when the NASCAR video featuring 'Backyard' will be out.

Read our full interview with Kevin Costner here.

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