emily: you think this is taylor ift's manager speaking? sean: that is an interesting theory. i don't know what she really thinks. i have talked to a lot of other artists who love streaming, and just want their music to be heard as widely as possible. emily: what you think is the biggest threat to facebook? ♪ emily: you are known as the guy from facebook. i know you and mark were very close. give us a status update. do you talk? sean: we don't talk nearly as much as we used to. there was a time when we would consult every day. generally speaking, it is a good relationship. emily: there is a scene in "the social network" when you and mark meet for the first time. after that, i believe you go and ang out with the ceo of uber. is that true? you go to a club, or something? sean: i think mark went to a club. travis has not changed at all. thes sort of in some ways perfect ceo of this company he feedshe enjoys -- off of the conflict and controversy. he is very good at dealing with complex situations where he is being attacked by all sides. as ank he would thrive wartime leader. emil