I used to have blue highlights, but the chlorine in the school's pool (I was required to swim in PE for three weeks) took out the dye, so now I'm left with stupid looking bleached hair. >_<
I got a electric blue extension once. They hotglue it to your hair. Suprisingly it didn't burn me,when my friend went to get her hair dyed pink they burnt her after bleaching it...Now she is stuck with blonde hair. It doesn't look bad though.