Actor Ryu Si Won will team up with SNSD's Yuri and Tiffany to MC for the "2010 MBC Gayo Daejun", to be held on December 31st at the MBC Dream Center. The trio has already caused a buzz in the industry, since all three members are Hallyu stars - it comes as no surprise, therefore, that they've already been given a new nickname: 'Hallyu MCs.' MBC's "Gayo Daejun" boasts an impressive line-up of stars for their show, which will include never-before-seen performances and special collaboration stages. Over 40 different teams and a 150-member audience are expected to appear for it. Meanwhile, fans of Yuri and Tiffany will be delighted to know that they will also host the Christmas edition of "Music Core" this Saturday as well, so stay tuned to allkpop! Source: OSEN via Nate, Girls' Generation Official Website