SHINee's Onew sang a special duet with fellow SM Entertainment member Luna of f(x) on MBC's Chuseok Special program Idol Star Trot Face Off. The duo sang a very old school trot song and named themselves the 'Milk Couple'. Luna also mentioned that her heart was beating fast and that she was nervous but Onew calmed things down by saying, "It's Ok because obba is here." Check out the wonderful performance below.