Taylor Swift's new video, "White Horse," has become the first ever to debut at No. 1 on CMT's Top 20 Countdown. The video exclusively debuted on CMT on Feb. 7 and quickly made history as the best debut ever on CMT.com. It remains the Web site's most-streamed video so far in 2009. Swift's video features Laguna Beach and One Tree Hill star Stephen Colletti. It was directed by Trey Fanjoy, who also worked with Swift on her videos for "Love Story" and "Teardrops on My Guitar."