Check out Mark Driscoll's/John Piper's response (11:00-19:00) to the question:
To Piper, the question is asked: "How do you stay relevant by - not totally, but by and large - avoiding pop culture?"
To Driscoll, the question is asked: "How do you stay faithful in transforming, rather than (being) transformed by taking part more in pop culture?"
Driscoll says -
"Those who are culturally relevant without being biblically faithful tend to be 'relevant heretics' and that's not our objective. Those who are faithful to scripture and removed from culture can sometimes be 'irrelevant orthodox' and our goal would be 'relevant othodoxy'"
and then proceeds to reference 1 Corinthians 9 -
Well put sir.