Listen to FREE SMILE (Inst.) online. FREE SMILE (Inst.) is an Unknown language song and is sung by 이효리 (Lee Hyori) and 이찬혁 (LEE CHANHYUK). FREE SMILE (Inst.), from the album 서울체크인 (Seoul Check-in) OST, was released in the year 2022. The duration of the song is 3:21. Download Unknown songs online from JioSaavn.