I was so disappointed in the collabs this album! It is supposed to be a tribute to POP but there are no pop collaborations! Should have called it RAPPOP or R&BPOP tbh!
Honestly, no shade, I think it's because she feels she is above the other pop girls and won't collaborate with them, but the more interesting/established/alternative female artists (Bjork, MIA, Kylie) see Gaga as below them and won't collaborate with her.