How strong is your hair? Is it strong enough to take the place of horse-hair in string instruments? JWT Singapore/Manila team up withUnilever shampoo brand Cream Silk Hair -- which purports to strengthen your locks -- to set up a string quartet's concert in a mall in Manila. The only catch: the quartet's instruments were made out of human hair that had been washed with the shampoo. The agency worked with South East Asian bow-maker Paul Goh for the project, which culminated in a 40-song, 240-minute concert, with zero hair breakage.