Sleeping Diamond

So I was off in my own world, and I started wondering how Diamond sleeps. I asked myself the question, "Does Diamond sleep with her tiara on?" At first, I thought the answer was an obvious "yes", but then I realized that wasn't nearly idiosyncratic enough. The idea came into my head that Diamond sleeps with a stuffed version of herself, because if anyone were to have both the means and the desire to do something like that, it would be her.

That's when it hit me: it's not cute enough for her to just sleep with her stuffed self. It needs to be a fact that she can't get to sleep unless she wears it on her head like her tiara. In other words, she can't get to sleep without a Diamond Tiara on her head. I'm going to believe this is an unarguable truth until the show inevitably contradicts me.