Carrie Underwood's new single, "Cowboy Casanova," was released to country radio late Wednesday evening (Sept. 2), almost a week earlier than expected due to a leak of the rough, unfinished version of the single on the Internet. The official version of the single can be heard on Underwood's Web site. She co-wrote the song with Mike Elizondo and Brett James. The latter's writing credits include "Jesus, Take the Wheel." Underwood's third album, Play On, will be released on Nov. 3.