Listen to Don't You Worry Child (Music Box Version of Swedish House Mafia) online. Don't You Worry Child (Music Box Version of Swedish House Mafia) is an English language song and is sung by Music Box Mania. Don't You Worry Child (Music Box Version of Swedish House Mafia), from the album MBM Performs EDM Anthems, was released in the year 2016. The duration of the song is 4:06. Download English songs online from JioSaavn.