The strong actresses make an appearance in Happy Together. Seo Woo expresses her love for BTS. Lee Chae Young talks about his love for partying and how she ended up in a dangerous situation while traveling. Koo Ha Ra talks about her hardships and efforts for success. Lee Da In shows off her charms. Meanwhile, it's the second part of Beauty and the Beast special of Sing My Song. Who will be the first to go home? Who will be the ending singer?