By Vernell Hackett NASHVILLE, Tennessee, Jan 23 (Reuters) - The release of country music singer Gary Allan's new album "Set You Free," this week, his first since undergoing vocal surgery in 2010, was not meant to happen so soon. But when his record label, MCA Nashville, saw his new song "Every Storm (Runs out of Rain)," race up the charts in September, the label pushed the album's release up two months from March.