WordPress › Support » post tags in plugin (not in loop)

I need a way to see if a post has a particular tag.

The problem is that the ways I've found are dependent on being in the loop. This is in a plugin and occurs outside the loop.

I'd like to get the tags like I can get the title

To get the title I can:
$postStuff = get_post($post_ID);
$title = $postStuff->post_title;

But I can't seem to add something like:
$tags = $postStuff->post_tags;

I've tried the following with no luck:

has_tag('tagnamehere')

and

$all_the_tags = get_the_tags();
foreach($all_the_tags as $this_tag) {
if ($this_tag->name == "tagnamehere" ) {
}
}

and even

$tags = wp_get_object_terms($post_ID, 'post_tag');
$tags_names= array();

foreach($tags AS $tag) {
if ($tag->name == 'tagnamehere') {
}
}

None of those work...

Any ideas?

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