Which song should I pick for the Relay For Life?

I want to sing a song for the Relay For Life. Which of these should I sing: We Are Family (by Sister Sledge), S.I.N.G (by My Chemical Romance), One Step at a Time (by Jordan Sparks), Celebration(by Kool and the Gang), Fly to Your Heart (by Selena Gomez), The Gift of a Friend (by Demi Lovato) On My Way (off of Brother Bear), It Will Be Me (off of Brother Bear 2), or Welcome to This Day (off of Brother Bear 2). The song with the most "votes" will be the song that I will sing for the Relay For Life. Thank you for helping me choose!