Catherine Zeta-Jones

If using strawberries to clean her teeth wasn't enough, Catherine Zeta-Jones is also said to boost shine by rinsing her hair in beer, although hairdresser Richard Ward believes the actress may be on to something. "Our grandmothers' generation swore by a beer rinse to get hair shining and many women still do this," points out Richard. "Just ensure that you rinse the shampoo out thoroughly and condition with conventional conditioner afterwards to disguise the smell and remove residue."

We recommend: Avoid smelling like a brewery and reach for Bumble and Bumble's Let it Shine shampoo (windleandmoodie.com), instead.