Recently, Nicole Richie went lilac, Kristen Stewart went burnt orange, and Katy Perry just introduced her slime green locks on Instragram. It turns out, all the celebrities have spring fever and what better way to indulge in the disease than with one's hair? Will this look make its way to the general public? How far will people go? Will hair become a flavour of the week? What colour is next? Is Rihanna's bright red look so five years ago?