1. You can have as many authors as you'd like.

2. If the artists are not the authors of the blog posts, I would recommend using a custom taxonomy instead, because it would be a more accurate model.

1. You can have as many authors as you'd like.

2. If the artists are not the authors of the blog posts, I would consider using a custom taxonomy instead, because it would be a more accurate model.

EDIT As it's been pointed out in the comments, taxonomies don't have built-in meta data, and custom post types or users are sometimes easier to handle.

1. You can have as many authors as you'd like.

2. If the artists are not the authors of the blog posts, I would recommend using a custom taxonomy instead, because it would be a more accurate model.

1. You can have as many authors as you'd like.

2. If the artists are not the authors of the blog posts, I would recommend using a custom taxonomy instead, because it would be a more accurate model.