Why do some people handle "popularity" differently than others?

Who cares? How do YOU handle it? Your Q is catty in the backhanded stereotypical female extreme. Who are you to judge her? How do you know what movie stars are actually like anyway? If you met them and they asked you to hang out you would grovel and brag to all your "friends". Tend to your own knitting as they used to say. What goes around comes around.