The two maknaes previously collaborated for a hot performance at the "2010 SBS Gayo Daejun", and they're teaming up once more for SBS's Lunar New Year's special, "Star Couple Challenge Cup"! 2PM's Chansung and f(x)'s Sulli will be returning as a lovely 'umbrella couple' this time around, and they wear dressed to the nines for the show. Chansung appeared wearing a crisp white suit, while Sulli donned a romantic white one-piece to match.  The maknaes performed a sweet couple dance that was said to have captured the hearts of everyone watching. It's said that we should look forward to Chansung's additional flair of charisma. So be sure to tune in on February 3rd for their special stage! Source: Daily Sports via Nate