Here are 2 famous musicians from Switzerland died at 25:
Werner Giger (April 17, 1949 Switzerland-July 31, 1974) was a Swiss personality.
Read more about Werner Giger on Wikipedia »
Maurice Bavaud (January 15, 1916 Neuchâtel-May 14, 1941 Plötzensee Prison) was a Swiss personality.
He died in decapitation.
Read more about Maurice Bavaud on Wikipedia »