Same here. My parents were out of the country (Ironically in Cabo San Lucas) and I sent my mom a picture mail of my ring. She freaked out via text msg. It was pretty funny. She was upset because my dad told her not to call from her cell phone.
I always thought it would be Love Ballad by LTD or Always and Forever by Heatwave. But now that we're actually engaged I'm not so sure. I'm guessing FI will want I Choose You by Ryan Leslie. We're gonna have to meet in the middle somewhere.