I think in order to call oneself a musician you need to have a certain degree of tallent. While I admit she might have a certain amount of tallent as a dancer, Much of Gaga's musical ability lies in her engineers being able to correct when she screws up. I dislike music like hers not because of the content, but because of how much it's been electronically played with to the point when a good deal of it is not her own work, but the perfection of people sitting at computers. I admire people who spend much of their early lives learning and perfecting the art of playing an instrument, and they are true musicians. Lady Gaga and the rest of her kind have not done that, or if they have spent years in vocal training, it still hasn't helped them, and do not deserve to be placed in the musician category.
But then again this is all by her choice and I believe she's old enough to decide that this is what she wants for herself. I don't believe this is the case with any of the child stars we're seeing come into fame.