"
Calm Down" is
Killing Heidi's eighth single released and the second single from their third self-titled album
Killing Heidi. The song was the #1 most added song to Australian radio during the week of its release. Lead singer Ella Hooper said of the song, "it's about [having] a big crush [on someone]". The video was shot in the grand open spaces of
Broken Hill, New South Wales.