Miley|Selena|Demi|Mandy?

The worst match-up in this set is #6: Demi and Mandy. I can just see that as an accident waiting to happen. But then again, they could surprise you; since I don't know them personally I really shouldn't judge, but that is my opinion. I think that any match up with Miley is pretty good because Miley seems to adapt well to new people and situations, and can take things in stride. I don't think that she'd have a problem with Demi or Selena to be honest with you. And #4 is a good match up too; Demi and Selena seem to be really good friends and support each other. I just think that #6 would be the weakest, and therefore the worst, matchup.