I think it goes "something inside of me", or something like that, which is sang by a girl, and the chorus by a group of children from the sounds of it. Would appreciate if you could help me find that song.

Any more lyrics?

Stab in the dark...

How about 'I Am In Love With The World' - by the Chicken Shed Theatre?

http://www.youtube.com/watch?v=0UmvR-4qQQQ

Something inside so strong?

http://www.youtube.com/watch?v=laUuUyyQ8sQ