The king and queen of K-Pop was back again on today's episode of MBC Music Core to perform their hit tracks. First up was Lee Hyori as she performed her final energetic bangin' performance of Chitty Chitty Bang Bang. Check out her awesome performance below! http://www.youtube.com/watch?v=Det2vWr1MVc Next, world star Rain was back with his charismatic performance of Hip Song. Check out his performance below! http://www.youtube.com/watch?v=247iUWqNNKQ