How a natural perky grin is associated with telling the truth. LIARS can be identified by their fake smile, scientists have claimed.
Neutral, perky grins — such as the Duchess of Cambridge’s — are associated with telling the truth.
But researchers found the type of smile often seen on celebrities such as Victoria Beckham and Cheryl Tweedy was not genuine.
The beaming “Pan Am Smile” of airline cabin crew also indicates a liar as the grin is forced.
North Korean leader Kim