Half the game had bouncy upbeat pop songs with cheesy lyrics on a permanent loop while you were exploring the game's mostly barren levels and doing basic fetch quests, making you feel like you were trapped in a 12-year-old girl's iPod
It would've been a perfect thematic fit for FFX-2 where you were playing as a girl idol group but in FFXIII-2 it was just one of the many puzzling things about that trilogy 
spoiler
Yes I have had the OST on my phone since 2011