Actor Kim Kap Soo of MBC's "All My Love" released a spoiler for the "Happy Together" line-up through his own Twitter! On March 19th, he wrote, "I'm going to film 'Happy Together.'�Line-up includes IU, Eunjung, Yangpa, and Kim Mi Ryeo.�I didn't think I'd be able to appear on the show with such pretty friends. It feels like a good Saturday, even the weather feels warm. Feels nice!" Netizens replied, "So jealous, you're with IU and Eunjung...," "You just revealed the line-up!," and "I must make sure to watch the broadcast next week." Source: JoongAng via Nate