December 10, 2014 11:45 am This Week on Open House Don’t miss an all-new Open House this weekend on NBC. Check local listings for air times in your area. US & World Videos 2:08 Jennifer Lopez stuns at first red carpet after Ben Affleck split 0:58 Rare 1787 copy of US Constitution is up for auction and it could be worth millions 0:52 What is the Guardian Cap on football helmets? 1:47 Carrie Underwood shares how her son is becoming a football fan 6:20 Paris Hilton reveals son Phoenix is saying her and Nicole Richie's iconic catchphrase