She started off as a blonde. She was naturally blonde. Then she dyed it a very dark brown that looked black.
After comments about it, I think she just thought she might as well dye it fully black. This became her signiture hair colour. Black it stayed for a few years.
However, dying your hair so drastically from blonde to black, can damage, and she recently in the past months dyed it a golden brown/blonde. She then dyed it more firery ginger, and then back to the gold colour. For her 'California Gurls' video, she appeared with it pale lilac, blue and black/dark brown if I remember correctly.
She stayed golden though, as her real life colour. She is now also well known for golden hair now, however, this is not a signiture colour of hers. She then went pink, which she has posed for magazines in this colour too.
She has also dyed her hair a very pale blonde, which you can make out pink highlights in. This style, is sort of Rihanna inspired I guess. Her current style is that blonde dead straight bob.In past years she also hair streaks of blue pink, green and other bright colours in her black hair.
Hope this helps, this is the biography of Katy Perry's Hair.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.