http://en.wikipedia.org/wiki/Popular_culture seems pretty terrible. Lots of junk citations in the lede.
Oddly, no-one seems to have noticed.
The conventional wisdom is that Wikipedia is full of teenage nerds, who are interested in and know a lot about pop music, the private lives of footballers and similar dross. Thus there is a lot of information about such topics, mostly pretty good. The downside is that such people don't know how to provide good sources.