Photoshop tutorial showing how to quickly, but effectively transform dingy, yellow teeth into a bright, Hollywood smile.

A killer-watt smile is commonplace in Hollywood, but part of Zac's charm ... Zac may have had ultra-thin veneers on the upper front four teeth, we can see the shape of the canine teeth remain ...

Dr Kath Stahl, who practises in East Yorkshire, said people chasing the "Hollywood smile" were being "blindsided ... And she warned that young people with healthy teeth were going abroad for ...

They’ve since transitioned into the Hollywood smile seen on the street ... making people believe that certain shades of white teeth are natural, even when they’re not.