Poor Rihanna! We thought she dyed her hair bright red just for fun, but apparently celebs who switch hues are "struggling with their identity and values." A random psychotherapist notes Rihanna has "recently been through a lot of trauma." [NYDailyNews]
I don't know if this theory really applies to Rihanna. When the whole incident happened I believe she had black hair and didn't switch it to blonde until sometime afterwards and now she was probably just bored and went red IMO.
She looks great no matter what.