哪位大侠知道这首歌是谁唱的？感谢了

第一段歌词是这样的
so so you tink you can tell
heaven from hell
blue skies from pain?
can you tell a green field
from a cold steel rail
a smile from a VEIL
do you think we can tell

so do you think we can change
everybody that hates
before it's to late
so proud to be free
but who can we blame
don't be ashamed
do you think we can change

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