I find it funny how Marry The Night was written to open the tour and ends up closing it. The song was also meant to be the lead single, and ended up the last single.
It's even funnier because the song was going to be the last song on the album, and then it became the first.
:deadbanana2;
Shes doing it as the last song because MTN needs that sales. It will stick to audiences mind and they will download it and it will be a WW #1.