Your favorite Monsters ghouls and the beloved Princesses are getting ready for en epic Instagram selfie challenge and the question is: who is going to get thousands of likes and will win the social media battle? They are all counting on your help, so feel free to join the girls in getting the ‘Monsters Vs Princesses Instagram Challenge’ game started and advice them on a few important things such as their funky selfie faces, outfits and cool accessories they could use to complete their looks with.