Musikhjälpen (; "Music Aid") is the Swedish version of the Dutch Serious Request radio and television campaign. The annual show is an appeal for money which each year helps a certain cause. Three radio/television personalities are locked inside a glass house for 144 hours, and they broadcast live on Swedish public service radio network Sveriges Radio and on public services television through SVT. People send text messages requesting a song, with each text costing 50, 100, 200, or 500 Swedish kronor. In later years, a Musikhjälpen-app has been used for requesting songs as well.