The singer first checked into treatment in 1998, followed by a stint a few months after marrying Kidman in 2006, at her insistence. Now, Urban, who shares daughters Faith, 10, and Sunday, 13, with Kidman, is giving her credit for helping him get back on track on his new ballad, “Thank You.” The song features lyrics like “I thank you for my life.” Urban says that touching message is specifically honoring his wife.