US actress Jessica Simpson has most people's idea of the perfect smile, according to a recent formula made by US scientists.

When celebrities like Reese Witherspoon were spotting carrying bottles of kombucha, it was inevitable that the exotic brew's popularity would, well, mushroom.

DE Niro - who presided over a panel that included US actress Uma Thurman and British actor Jude Law - said the festival had been "a very civil experience".