RATING (out of 5 stars): 4 stars COST: $6.50 each THE SKINNY: This is my summertime go-to shampoo for keeping my blonde locks looking bright and sun-kissed. Several of the John Frieda shampoos irritate my scalp, but this is not one of them. This is a decent shampoo that leaves my hair soft and manageable. As an added benefit, it helps to lighten my hair a tiny amount each time, chasing away dull color and adding natural-looking highlights. The shampoo uses lemon and chamomile to lighten (and…