Nexxus is entering a “bold” new chapter with pop legend Christina Aguilera, notably “Xtina,” to demonstrate the revitalizing power of its new Keraphix Damage Repair line. The collection is designed to deliver 34 times stronger hair after one use (versus non-conditioning shampoo). “Nexxus was born with a mission to prove that the secret to resilient style has always been rooted in science,” said Lynn Fischer, head of brand, Nexxus North America. “Christina’s looks have defined ge...