Add css class to top selling products

Add css class to top selling products

/**
 * Add topseller class to product
 **/
 $query = "SELECT ID FROM {$wpdb->posts} p
			INNER JOIN {$wpdb->postmeta} pm ON ( pm.post_id = p.ID AND pm.meta_key='total_sales' )
			WHERE p.post_type = 'product'
			AND p.post_status = 'publish'
			ORDER BY pm.meta_value+0 DESC
			LIMIT 10";

$topselled_ids = $wpdb->get_results( $wpdb->prepare($query,OBJECT ));
/*echo '<pre>';
var_dump($topselled_ids );
echo '</pre>';*/

foreach  ($topselled_ids as  $one_topselled_id){
	$topselled[] =  $one_topselled_id->ID;
}

if ( in_array($post->ID, $topselled))
	$classes[] = "top_selled";

/**
 * End Add topseller class to product
 **/