I only focused on artist that exploded in the late 90s and beyond. Your answer is just based on your preference. Not who is more successful/popular now or whatever lol. Feel free to add anyone who is missing.
Taylor Swift definitely. Her voice might not be the most beautiful or strong ever heard but her songs are great! She has shown that she doesn't care of what others think of her and it's what makes someone a star, at least in my books that is. I love Katy Perry too.. And J Lo but to me, Tay is the only Queen.