Jennifer Lawrence And Kristen Stewart's Awkward Oscar Run-In! Fill In The Blank!!

It’s Katniss Everdeen vs. Bella Swan!!!
It’s an actual Twilight/Hunger Games showdown!
Jennifer Lawrence and Kristen Stewart had an awkward run in on the Oscars red carpet where they refused to look at each other in the eye because _____________________________.
[Image via HuffPo TwitPics.]