By Deborah Evans Price NASHVILLE (Billboard) - Unlike the winners before her, current "American Idol" champ Carrie Underwood is gunning for success in not only the pop format, but the country arena too. Thus, Arista Nashville, a division of RCA Label Group, is partnering with 19 Recordings and J Records in New York to promote Underwood's November 15 debut, "Some Hearts." Underwood already has scored with "Inside Your Heaven," this year's best-selling retail single.