Questions....

So there are a few questions I've run into since starting my project.  As I'm writing my literature review I've found I'm getting more and more confused about what exactly I want it to say.  As it's done now, I focused on research which examines the media's effects on body image.  My project will be an analysis of Cosmopolitan Magazine's cover pages for 2010.  Should I be trying to find research on that specifically?  I haven't run across anything similar, but there are probably studies out there....  Also, are our papers supposed to detail all of our methodologies and reasonings?  Do we write these papers as if you would an empirical research study?  Or do we just talk about what we found?  The other question I have is, does the research that we use in the body of our papers need to be addressed in the lit review?  Do the sources used in the lit review need to brought up again in the body of our papers?