Vocally, Zendaya, Miley, and Demi (and maybe Bridgit, though I haven't heard too much of her), are all good.
However, most of the Disney girls are talented in at least one facet, whether it be marketing, acting, or music.
You forgot Bridgit, Raven, Hilary, China, Selena and that girl from the Cheetah Girls...
Basically most of the disney girls are talented in something, unless you're one of those people who think singing is the only talent in the world then...
I don't think Demi Lovato's is talented at all. Talent is given to people so they can express themselves in the their most creative and unique way. Demi is a try hard that can't express herself at all.
I agree Miley is talented. Who's Zendaya? (No Shade)
anyway, Selena Gomez is way more talented than any of them.
