NASHVILLE, Tennessee (AP) - They were high school sweethearts. But the romance has gone sour for Jason Aldean and his wife, Jessica. The country music star has filed for divorce from his wife since August, 2001. The official reason: irreconcilable differences. There were reports recently that the couple had separated - and those reports were confirmed last week by reps for the singer. In a statement, Aldean says the divorce is "a really tough time" for all - and that they are committed to raising their two young daughters. Aldean is country music's top-selling male act, a top concert draw and won the Academy of Country Music Music's male vocalist of the year award.