How???

Based on a long-haired friend who covered her pink her with black dye and then tried (and eventually succeeded) going blonde at home - with about 4 or 5 successive treatments - their hair must be suffering.  My friends hair is now in awful condition and I wouldn't give it long before she resorts to the scissors.

It's why so many of them have cruddy looking hair unless someone is professionally styling it for them and/or why they go short from time to time - they have to get rid of all the damage. Could also be a partial reason for the growing popularity of fake hair. It's not just the versitility without a commitment but possibly because their own hair is fried. Maybe with the growing popularity of wigs some of them will give their hair time to recoop. Just guessing.

Someone posted a thread that had britney blonde,then black,then blonde again.And that was only in one week!

How in the world~can some hair dresser tell me please,can these celebs do this to their hair and it never turns mushy or falls out?
Yeah,yeah,yeah they have the best pros,but unless these pros have access to super powers I dont see how it can be done.
Really,if I went out tomorrow and tried to do this a salon would think I was crazy and tell me I shouldnt do it. I just dont know how some of them have any hair left.