<?php $args=array(
'meta_key' => 'views',
'orderby' => 'meta_value_num',
'posts_per_page'=>10,
'order' => 'DESC'
);
query_posts($args); while (have_posts()) : the_post();?>
<li><img <?php the_post_thumbnail( array(60,60) ); ?><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a></li>
<?php endwhile;wp_reset_query();?>