What do you think is a good song to sing for the Relay for Life?

I am singing song for the Relay for Life in July. I need to know out of these songs which would be the best so I can start practicing. The songs are: One Step at a Time (by Jordin Sparks), We are Family (by Sister Sledge), S.I.N.G. (by My Chemical Romance), Celebration ( by Kool and the gang), The Gift of a Friend (by Demi Lovato), Fly to Your Heart (by Selena Gomez), and Connected ( off of Barbie and the Diamond Castle.) Thanks!