As ghastly as this sounds, there have not been many deaths in entertainment that have moved me. With that being stated I can honestly type that the death of Avicii has me baffled. 

The official cause-of-death has not been disclosed but there was always talk of how he battled with the substance abuse. Avicii reached stardom as a DJ at the height of the EDM (Electronic Dance Music) wave in mainstream music; that culture is all about music festivals and drugs.