Should Comedians Be Pop Culture Experts?

Pop culture.  It's frickin' everywhere.  It's like too frinkin' everywhere.  Who could keep up with it all?  No one.  We have lives and dreams and goals and other people we know.  But mention that you have no idea what happens in the Hunger Games and people look at you like you've never heard of bread.

And if you are a comedian you have to be even more in the pop culture know.  But how important is if for comedians to follow every aspect of pop culture? Is it a job requirement or just something to keep you from looking lame?