Jason Aldean has sparked a war of words with fellow country music star Zac Brown over comments he made about his pal Luke Bryan's new song. It appears Brown is not a fan of Bryan's That's My Kind of Night and he recently called it the worst song he has ever heard. The remark has irked Aldean, who took to his Instagram.com page to fire back, writing, "I hear some other artist are bashing my boy @lukebryan's new song, sayin its the worst song they have ever heard. "To those people runnin their mouths, trust me when i tell u that nobody gives a s**t what u think. Its a big ol hit so apparently the fans love it which is what matters. Keep doin ur thing LB!!!"