Herbal Essences featherweight shampoo makes my hair more blonde?

I would always use a regular shampoo, i would switch to a new one every now and then, but then i started using Herbal Essences featherweight shampoo and it began to make my hair a lighter color. It was awesome! it was more effective then my manzanilla chamomile shampooa href="http://www.mexgrocer.com/82013.html." rel="nofollow"http://www.mexgrocer.com/82013.html./a My friend who has very light hair told me: Hey your hair is almost turning into my hair color! and my mom would also say that why is my hair so much lighter. i new it was the shampoo. then i stopped using it and my hair stopped turning lighter and back to it's normal self. im not sure if other people experienced the same thing or if it was maybe just my hair.