请问`这视频里的歌曲`是什么歌名`谁唱的？

是tell me why，去年就听过的，当时被誉为英国天籁般的童声。歌手是Declan Galbraith，好像才12岁，前途无量的家伙~~

下面是网上找的资料：

《Tell Me Why》歌词及中文意思
In my dream,children sing
A song of love for every boy and girl
The sky is blue and fields are green:
And laughter is the language of the world
Then i wake and all i see
Is a world full of people in need

Tell me why(why) does it have to be like this?
Tell me why (why) is there something i have missed?
Tell me why (why) cos i don't understand
When so many need somebody
We don't give a helping hand Tell me why?
Everyday i ask myself
What will i have to do to be a man?
Do i have to stand and fight
To prove to everybody who i am?
Is that what my life is for
To waste in a world full of war?

tell me why?tell me why?
tell me why?tell me why?
just tell me why, why, why?

Tell me why (why,why,does the tiger run)