I love when I hear a song in my head, and then I put on the actual song... and it plays in the exact same key as I hear it in my head.

It feels as if what's in my head is suddenly on the outside of my head too, as if it travelled seamlessly through my skull. What was formerly only audible to me is now also audible to rest of the world within hearing distance. It's that seamless transfer from inner to outer that is so cool.

Are most people able to do that? Is it not so special to be able to remember the key of songs and be able to reproduce the song in that key at any given moment?