I can't see Frozen for AOTY now. However, "Let It Go" is all over commercials at the right time. It could be a Song of the Year nominee to make up for Frozen possibly not being nominated for AOTY.
Bey just has to win AOTY. I truly can't think of any other mainstream contenders, unless they go for something left-field. Maybe Arcade Fire, but they won it a few years ago so it's unlikely.