Graduation Songs for Middle School Graduating Class of 2011? URGENT, PLEASE HELP!?

I'm performing at my middle school's graduation ceremony on 6/20/11, and I'm really struggling to find a song that fits perfectly to my class. So far I've got Give It All by He is We, The Climb by Miley Cyrus, and Whenever You Remember by Carrie Underwood in mind. But, with Give It All, I know it by heart but some of the notes I'm afraid may be too high and my voice will break (I'm a girl). With The Climb, I know that by heart too, but I don't really feel it applies that much to a graduating middle school class. And Whenever You Remember would be perfect if I knew it better, but I don't have enough time to memorize and practice the song to perfection before Monday. So, I need suggestions. Desperately. I'd prefer more current songs, so I wouldn't have to learn anything new (like I mentioned, too short on time), so that rules out that Vitamin C song. PLEASE HELP, THIS MEANS SO MUCH TO ME.