Hi Sis@fgnuva, I think the John Legend's song was playing in the background. Remember Shin Hye has her green speaker and that was the song which was playing and she just sang along. Yup, those two are such songbirds and random dancers
They should have held a song and dance show right there in the farm to entertain the PD Na and the crew, LSJ, KKK, Jackson and her family, the hen girl group, the busy bees and of course, Mingki and her two restless puppies
PD Na and his assistant PDs were really observant and meticulous, they can spot all the nitty gritty details and used them as captions and background music. I wonder how many hours did they spend to edit just one 3MAD episode.