MICHELLE Keegan's hair always looks perfectly glossy, and the product behind her healthy locks is on sale. The star previously revealed that she swears by the celebrity-approved Kérastase Resistance range. Kérastase's Resistance Force Architecte Daily Strengthening Shampoo, £22 (was £27.50) Michelle, 39, raved about Kérastase's Resistance Force Architecte Daily Strengthening Shampoo in particular, and now shoppers...