<P> `` Do n't You Worry Child '' is the sixth and final single released by Swedish house music supergroup Swedish House Mafia . It is the last single from their second studio album , Until Now , featuring vocals from Swedish singer John Martin . In the United States , it is the act 's second number - one single on Billboard 's Dance / Mix Show Airplay chart , following `` Save the World '' . It received a Grammy nomination for Best Dance Recording in the 2013 Grammy Awards , as did its predecessor , `` Save the World '' , the previous year . The song is written in the key of B minor . </P>
<P> `` Do n't You Worry Child '' is the sixth and final single released by Swedish house music supergroup Swedish House Mafia . It is the last single from their second studio album , Until Now , featuring vocals from Swedish singer John Martin . In the United States , it is the act 's second number - one single on Billboard 's Dance / Mix Show Airplay chart , following `` Save the World '' . It received a Grammy nomination for Best Dance Recording in the 2013 Grammy Awards , as did its predecessor , `` Save the World '' , the previous year . The song is written in the key of B minor . </P>
who sings vocals on don t you worry child
who sings vocals on don t you worry child
John Martin
John Martin