I'm well aware of Lady Gaga's songwriting ability and talent as a piano player. However, the Gaga persona seems to be her of her own creation, and I'm quite sure that at least for her first album, she wrote most of her own material.

I'm not blaming anyone - the music industry is a strange beast. But the true rarities are people like Gaga (as much as her I dislike her music), who can write and perform their own material well.