how to share other than youtube?

new to iPhone ( I have the iPhone 4 ) and new to T-pain. I have reviewed the forums and support pages, but can't figure out how to email songs. If I play a song, I only have the option to upload to YouTube. Also, I created a Smule account but don't see any settings in the app to link the app/songs to my Smule account...

Any help would be very much appreciated!