No, it's voted by a group of judges I believe. The award voted for by the public is Best New Artist.
And the public is not always right (robert pattinson winning over dev patel at the teen choice awards, for example-with the same group of people who would have voted). None of the choices were good to begin with, and the people watching aren't exactly...exposed...to some really good music. Yes, someone had to have gotten the award, but it doesn't mean anyone truly deserved the title, Best Female Video.