Red Velvet's Wendy and Jung Joon Il put their voices together in remembrance of deceased Seo Ji Won

On the September 28 airing of SBS's Chuseok special program called 'CPR Song,' Red Velvet's Wendy and Jung Joon Il harmonized to a long-forgotten song titled "76-70 = (heart)" by singer Seo Ji Won.�

The song's original composer, Park Seon Ju said in an interview, "I composed and wrote this song and even sang it with [Seo Ji Won]. It's about a man and woman who are in an ambiguous relationship."�

"This song has never been sung on stage before. I hope they will sing it with heart because I believe it will make for a fantastic stage and special memories." Through Wendy and Jung Joon Il's vocals, the judging panel and the audience recollected memories of Seo Ji Won, who passed nearly a decade ago.�

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'CPR Song' is a special program which revolves around a concept of enjoying artists' songs which are considered hidden gems that didn't make the cut as the album's title tracks.�

Check out their wonderful performance above!