Untitled

Navigation control (using functions)
private void butArtists_Click(object sender, RoutedEventArgs e)
    {
        PhoneApplicationFrame frame = Application.Current.RootVisual as PhoneApplicationFrame;
        MainPage mp = frame.Content as MainPage;
        mp.PlayerMenu("Artists");
    }

var uriFragment = @"views/ArtistsView.xaml";
(App.Current.RootVisual as Frame).Navigate(new Uri(uriFragment, UriKind.Relative));