Photography & Being An Artist

I was just sitting here thinking, as im trying to create a new photography logo, just how hard being an 'original artist' is these days. I suppose it's the same for writers (song or otherwise), painters, fasion designers, etc . No matter what you 'create', you can be pretty sure it's been done. Even looking for ideas for my logo, it's very difficult to not copy someone. Is this why we also say things like: 'That Lady GaGa song sounds exactly like Britney's last one?'