Well i believe the song has many hints and me and my friends are trying out a theory that relates to the song. In the song she says "Bring me 115" 6 times and in the game there are 6 weapons that have the name 115 in them if u get them upgraded. So we were wondering if 3 people got 2 guns each and we either killed ourselves or let zombies kill us and have one guy alive something might happen or we go into one of her rooms and perhaps put them in there somewhere....we got so close but the last thing we needed was that l96 sniper and we spent about 30,000 points in mystery box but it would always land on it and switch to another one.....i believe that treyarch did this on purpose for if anyone got close to figuring out this theory...if anyone was to get more and more of the 115 guns ...the percentages int he mystery box for the last 115 gun would go down so low to where almost impossible to get......just a theory though :D