I would advise against doing songs in general, since you need to talk about the musical elements of the song e.g. tempo, key etc. as well as the lyrics and a Taylor Swift song really isn't substantial enough to be able to analyse in depth
Bend It Like Beckham isn't a bad text, but it is a fairly common one, so just be aware of that.
You want to be able to link your related texts with your core/prescribed text, so look for texts that either talk about similar issues or aspects of belonging to start with, and go from there.