The very most upsetting to me were:
Karen Carpenter, Johnny Carson, and Stevie Ray Vaughan. Those were bone crushing losses. Especially Karen and Stevie who were so young. Carson seemed like a father figure in some ways. I saw him practically nightly for so much of my life - far, far more than my own father. And he was a giant.
There recent spate of deaths including David Carradine and Michael Jackson were very hard. I have for so long enjoyed their talent and it is incredibly difficult to believe they are truely gone.
Some of those names were such a shock to me. You just never imagine that they would die, even though you know it will happen one day anyways, but we tend to look at some celebrities as immortal.
Am I the only one who finds upheaval about celebrity deaths sort of annoying? Apart from the fact that the death of every minor 70s tv actor seems to be worthy of several concurrent threads in Misc and GTV&M, I find it rather undignified and impolite to express mourning over the deaths of people you didn't personally know--with exceptions of course, but they should be that: exceptions.
Even though you don't know a person personally, you still look up to them and feel a connection. Everyone has some sort of impact, whether it's looking up to them for inspiration or them being the one who made you laugh every night. You feel like you're losing a friend that you've never met.