Complimentary jewels
As it was said before celebrities are the perfect advertising material for those who produce cars, clothes, perfumes, jewelry and so on and so forth. Those are peculiar goods and those are not goods of the emergency so people have to do their best in order to make people buy those goods. So, they use celebrities as their advertising material.
It is barely offensive to celebrities to be used as the advertising material as they gain a good amount of merits because of such state of things. Who will refuse the opportunity to have complimentary car or complimentary dress or complimentary gems? No one will, it is a pleasure to have those as a gift and so they enjoy this merit of their lives.
When there is some special fest is organized where to the celebrities are invited they will for sure receive a number of suggestions as for the clothes they will wear and as for the gems they will have on them. And this is where the most interesting part starts, a number of goldsmiths and designers suggest them to have their gems on just like that.
So, this is another feature of the bright side of fabulous life of celebrities, the side that makes people blind with its shining, and that is also another reason for people to dream about life like that. So they dream about it and they want to have the same life and that entire complimentary staff.