Get Popular Post in Wordpress

<?php $pc = new WP_Query('orderby=comment_count&posts_per_page=3');
while ($pc->have_posts()) : $pc->the_post(); ?>
<div class="bigblogbox">
<div class="bigblogimg"><img src="<?php echo get_template_directory_uri(); ?>/images/bigblog_img.png" alt="img"></div>
<div class="bigblogdetailbox">
<h2><?php the_title(); ?></h2>
<div class="bigblogdetail">
<div class="userdiv"><?php the_author() ?></div>
<div class="datediv"><?php the_time("l, F d, Y"); ?></div>
</div>
<div class="readmore"><a href="<?php echo the_permalink(); ?>">read more</a></div>
<div class="clearfix"></div>
</div>
</div>
<?php endwhile; ?>