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Full Episode Summary

This 2-hour year end special includes videos from the biggest names in music like Beyonce, Green Day, Katy Perry, Pink, Rob Thomas, Kings of Leon, Lady Gaga and many more. Industry insiders, pop culture experts and the artists themselves will be on hand to tell us the stories behind the most memorable clips of the year and to explain why these 40 videos are the very best of 2009. You bought them in stores, you downloaded them on your computer, you heard them on the radio and you voted to see them on VH1's weekly Top 20 Video Countdown. Now it's time to count them down.