“Don’t You Worry Child” is a song by Swedish electronic dance group Swedish House Mafia. It is the sixth and final single released before the group broke up, 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 D major.