Amusing

You only live once, you might as well be amusing.

~ Coco Chanel

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And you might as well be amused.

They are not the same thing. For example:

To be amusing - play the ukulele - even if you play it poorly.
To be amused - watch someone play the ukulele poorly and call it a "puke-ulele." But do it in your head and to yourself. Otherwise you're just kind of a jerk. If you keep it to yourself, you're still a jerk, but a different kind of a jerk.