Answer:
I am a rock group with four members all of whom died in plane crashes. Who am I?
I'm sometimes white and always wrong. I can break a heart and hurt the strong. I can build love and tear it down. I can make a smile, but more often bring a frown. What am I?
What two keys cannot open any door?
I'm the source of all emotion but I'm caged in a white prison.
I repeat only the last word you say. The more I repeat, the softer I got. I cannot be seen but can be heard. What am I?
The answer I give is yes, but what I mean is no. What was the question?