Jessica Alba, Halle Berry and Christina Aguilera all have news to smile about today.

The results of a new psychological study reveal that the British think people of mixed races are the most naturally beautiful and successful, reports UK's The Daily Mail today.

Head researcher Dr. Michael Lewis attributes the results to a handful of reasons. In a Darwinian type-theory, mixing between such different genetic backgrounds can create a more "fit" person, who is more attractive as a result. And culturally-speaking, since there are more mixed race people than ever before, more people can identify them. Plus, mixed-race celebs like Leona Lewis have paved the way for Brits to think of ethnic mixture as more beautiful, talented and glamorous.

Conducted at Cardiff University's School of Psychology, researchers collected a diverse sampling of 1,205 black, white and mixed race faces from Facebook groups - which were then rated by participants on a scale of one to ten by 40 female students.

Mixed-race faces had a 55 percent greater chance of being rated more attractive than either of the single races; and faces rated as "extremely attractive" were overrun by the mixed race submissions.

Dr. Lewis claims the study results represent a larger proportion than one would expect, based on the just three percent existence of mixed race people in British society.

Darwin actually addressed mixed race breeding in a paper put out in 1876, which featured the theory of heterosis, or hybrid vigour. In it, Darwin speculates that cross-breeding will lead to offspring that are genetically stronger than their parents.

"There is evidence, albeit anecdotal, that the impact of heterosis goes beyond just attractiveness. This comes from the observation that, although mixed-race people make up a small proportion of the population, they are over-represented at the top level of a number of meritocratic professions like acting with Halle Berry, Formula 1 racing with Lewis Hamilton, and of course, politics with Barack Obama," says Dr. Lewis.

And, as evidenced in the case of President Obama -- we wonder: are those with a mixed race background more inclined to pick stylish spouses?