"Popular culture studies is the academic discipline studying popular culture [a.k.a. pop culture] from a critical theory perspective. It is generally considered as a combination of communication studies and cultural studies. ... Conceptual barriers between so-called high and low culture have broken down, accompanying an explosion in scholarly interest in popular culture, which encompasses such diverse media as comic books, television, and the Internet."
-Wikipedia entry on Popular Culture Studies
Here is a sample of relevant subject headings for the OPAC:
You may get more results if you search the subjects as phrases.
Keywords and Phrases:
Many of these headings and keywords are used by other research databases.
If you are having trouble finding good quality sources on a specific trend, web site, or video game, research its history.
Although it may seem as if they pop out of nowhere, all ideas have a past. Find its roots. Put it into context.
Here are are some sources: