Earlier this week, I donated some Gmail invites to Gmail4Troops. I logged into my account a few minutes ago and found four more invites. I'm donating two to Gmail4Troops, but I'm offering the other two here on the site. The catch? You have to answer the following riddles correctly. First two people to do so correctly get the invite. What purpose does this serve? Well, none really, but it sure is entertaining. ;)

Make sure to leave your ACTUAL email address in the comment form when you post. Oh and btw, there's no way you can Google these questions. I've already checked and you'll just have to use your brain. Good luck!

What state is surrounded by the most water?

I cannot be felt, seen or touched;
Yet I can be found in everybody;
My existence is always in debate;
Yet I have my own style of music.
What Am I?