I have got a new CD by my favourite singer.和I have got a new

I have got a new CD by my favourite singer.= I have got a new CD presented by my favourite singer.主要指的是那张CD是由某歌手出品
I have got a new CD of my favourite singer.
就没有这方面的意思,就是买了张某歌手的CD.
事实上...感觉基本没啥区别...-____-!