Because these things always happens in 3's, there will be one more music-related celebrity death by the end of today, and furthermore, just like Poly Styrene and Phoebe Snow, the third death will have the initials "PS". Based on this formula, here are my guesses:
1. Pete Seeger
2. Paul Simon
3. Paul Stanley
4. Peter Sframpton
Please don't send me any hate mail about this list. I am a music scientist, and this is my research.