I can distinctly remember when I realized Kelly had become a diva. It was when Clay Aiken covered her mouth with his hand. They had been joking about her talking a lot up to that point. Kelly didn't even have the grace to play it off. Instead she scolded him and made a derogatory comment that seemed entirely unnecessary.
Don't get me wrong, I certainly don't want anyone putting their hand on my face let alone my mouth. Yet, I wouldn't use live TV to belittle them.
Here are two videos on it. The first one shows a background retrospective by Inside Edition, which shows Kelly doing the same things TWICE first to Regis (and then WHY Rosie O'Donnell got into it):
Now, knowing the overview, watch the video of the incident with Clay and how the next time on the show, Kelly goes off about it for
3 minutes! And the WAY she did it.

What's interesting is that she once again talks about demanding RESPECT, (like her speech, when she came back on Wed, about the network not giving her advance notice about Michael,) yet, IMO, she's quite rude talking
about Clay, without him being there to defend himself or able to apologize or clear things up.

Uh. . . yeah, NOW we know WHY no one at the network or Michael wanted to be the one to tell her he was leaving.

ALSO, WHY the network, in Kelly's own words this Wed, had "sharp shooters or snipers up in the balcony," to make sure she didn't stray off topic of the message they allowed and approved of her to say when she came back. If they hadn't, she would have gone off about them and Michael for 3 minutes.
She can be a vindictive *****
