Yura, Hyeri, Hani, Jeon So Mi, and Kim Se Jung to guest for 'Happy Together's 'Return of Tray Noraebang' special

For those unfamilliar with 'Tray Noraebang' corner, it's a segment that ran from 2001 to 2005, where the guests heard a children's song and had to sing it from hearing it just once. Of course, there are various chances and games the guests can play for an extra listen, but when they get it wrong, the tray will fall from the ceiling and hit them on the head.