These are the music videos that have defined the century...so far. For this list, well be looking at the biggest, best, and most memorable music shorts on this side of the millenium. Our countdown includes Work It, Bad Romance, Uptown Funk, Californication, Gangnam Style, and more! Did we miss one of your favorite videos? Let us know in the comments below.Watch more great music videos here: Top 20 Most Important Moments in Music History: