There is no true form of beauty. Beauty is in the eye of the beholder. One person may find a certain person the most beautiful person in the world while others may disagree. It all depend's on everyone's preference. Everyone should just love themselves for who they are because we all have imperfections xD but love somehow turns those imperfections into perfect imperfections.
Well, beauty is a bunch of subjective tastes at an individual level that comes together in a society to form an objective ideal. It varies from culture to culture, but in modern times, it seems like what all cultures have in common is the ideal is a lighter skinned person. Highest purely in a physical sense in a Western society is probably models and actresses. Doesn't mean much though since again, at an individual level beauty is more subjective and only one element of attraction.