Why wasn't Slumber Party on the Fifty Shades Darker soundtrack?

[ZAM9315]

Ugh I swear id her song was featured rather than zany and Taylor's 

(which I still love, it's a bop) it would be huge.  

[secondgeneration]

On Wednesday, February 01, 2017 at 9:02 AM, PokemonSpears said:

Slumber Party? There are so many Britney songs that come to my mind for the movie, before SP

This

[EarlyMorning]

but Toxic will be