You can unsubscribe from the celebrity news and stuff but your friends will end up sharing as they would have subscribed to the celebrity junk. You can't do much about that.
Alternatively, you can change their subscription level on their profile page for the same effect. You might want to do that if you share status updates or set privacy for your personal information like phone number and address to "Friends except Acquaintances" and this friend isn't actually an acquaintance and should get that stuff.
Unfortunately, if you want to both "see everything" and "avoid celebrity news", there isn't a solution to that at the moment.