The definition of beauty in modern society has a lot to do with the culture a person comes from. You might compare and contrast what is beautiful to different cultures. You might also compare and contrast modern beauty with what was considered beauty in the past. Elizabethan women were considered to be more beautiful if they had pale skin. Today, many cultures view a tan as more beautiful than pale. It might be interesting to compare some of these older views in direct contrast to some of the more modern views. It might also be interesting to compare some of the reasons why this is. In the example above, Elizabethan society considered a tan to be a sign of a worker. Someone who was outside all day in a field or other employment would have been seen as less desirable than someone who could pay others to work for them. As times changed, a tan was thought to mean a person was more healthy. Ideas about beauty changed as society changed.
Your post reminds me of the baby and child beauty pageants that are so popular with some misguided parents today. You may want to research this aspect of beauty and how it affects both the parents and the child.
Do not forget that since this is asking you to examine “contemporary beauty” that you must also give a brief nod to past concepts of beauty. In earlier generations, bigger, broader, more robust women were considered beautiful. That is not necessarily the case for contemporary times.
Perhaps you can compare and contrast the way that beauty is conceived of in different cultures or in different countries. Here in the US, for example, (if we're talking about female beauty) different cultural/ethnic groups value different things in a woman. This is true across countries as well.
Well, to being you could look at different definitions of what beauty is. Beauty differs in both private and public sectors. Take a look at the Dove Campaign. Dove is trying to show true women, not women like the ones seen in Victoria's Secret or Cosmo. Historically, beauty has changed over time as well. Either way, I am sure that you will have plenty of information if choosing historical beauty or global beauty.