How clearly can you envision music in your head?

Music seems to stick in my head really, really well. If I sit and “listen”, I can almost hear a piece of music in my head, start to finish, kind of like there’s a radio on low volume playing. The instruments, nuances of the song, etc. Like a radio. Sometimes, it’s so clear that it’s like I’m hearing it with my ears.

I got to thinking about this last night and I am curious how many of you are able to do it, as well. Bonus question: are you a musician?