One of the tragedies with Amy is that she went from being so beautiful, a healthy weight and full of life to almost skeletal and virtually dying in front of us. I'm actually surprised she didn't die before. It was devastating seeing her spiral completely out of control. I know she had her demons, but Blake was like the Grim Reaper. He destroyed her.
As well as overwhelming sadness, I find is horrifying that this was allowed to happen. I don't mean that people didn't try, especially her mum, but personally I think that she should have been sectioned. She was a clear danger to herself and as well as alcohol and drug addictions, I'm certain she had an eating disorder too.
One last thing is how much I cringe when people say "Rehab" is their favourite song. How anyone can enjoy this song is beyond me. The popularity of it must have reinforced Amy's belief that she didn't need to go to rehab, when she so obviously did.