Boom Boom was the Danish entry at the Eurovision Song Contest 1978 in Paris performed by the group Mabel. It was Denmark's return to the contest after a 12-year absence. The song is sung as a dialogue among friends, with one explaining that he is suffering from an illness. The others suggest what it could be, but he reports that a trip to the doctor resulted in a diagnosis of being in love - with the rhythm of the heart being the title of the song. It was performed 16th on the night following Greece and preceding Luxembourg. At the close of voting, it finished in 16th place with 13 points.