She did, and when she called ARTPOP the album of the millennium she was joking (and even had to say she was joking since some people couldn't catch the joke).
Not sure why we're talking about GaGa though? Because she's higher than Justin or what?
Every artist that creates their own music has the right to take pride in their work. You wouldn't know about that, would you?
Trying to prove that point when you're a Justin Bieber fan is impossible sweetie. I used to like his music and him as person....but lately the boy is growing up to be a mess. He has to accept that he'll never top ALAYLM.