How to save a voicemail on an iPhone to a computer?

My friend met one of my favorite celebrities and had them call me and leave me a voicemail (I was in school.)
So I was wondering if their was a way to like send the voicemail as audio to my email or save it to my computer somehow.
I have an iPhone 5c and a windows computer.

Easiest and fastest way:

Check out this site: www.SaveMyVM.com