Graduation! Freaking Out! Music Help!?

Okay the Vitamin C song is pretty annoying. Just my opinion. Plus, it is mostly chanting and talking. Not much to show off your voice with. And if someone else is doing the Climb, don't do it. A moment like this by Kelly Clarkson is a really good song, but listen to the lyrics- it is about kissing. And We Are The Champions isn't really a song you can sing either. I dont know the other ones though.