I am going to have my teeth laser whitened, what kind of results can I expect to see?

My teeth are not yellow, but could be whiter. I want to get really white teeth (like hollywood white) would I be able to get this result from laser whitening? If not what is the way? Thanks:)
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well. I have had it done and it goes up I think 2-3 shades instantly....which is very fast. I cant give u a definite answer because results really do vary greatly. Good luck!
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