Marked as K-pop's Hot Trend II for 2010 by Music Bank, the "Duet Craze" performances lit up the stage on this special year-end episode. It's always better when there's more than one, and when two stars come together, their popularity and abilities double! This year's hottest duets, IU and 2AM's Seulong and 2AM's Changmin and 8eight's Lee Hyun, reunited today for Music Bank. Check out their performances below! Check out Seulong's special show of affection towards IU! Bonus selca after performance to which Seulong explained his hug, "The original members have come together! The preparation was fun, and so was the stage^^ The hugging scene was my own parody of 'Secret Garden.' Sorry that we could only come up with just this."