Newo1t on "WP Query with current tags"

Hi,

I try to make a plugin in a post, wich take the tags of this post but I can't do..

can you help me ?

Here's my wp query :

<?php
$recent_posts = new WP_Query(array(
'cat'  => '16,21',
'tag' =>  get_the_tags($post->ID),
'showposts' => 6
));
?>

Thank's !