From some of the responses..
From some of the responses it seems like people don't fully comprehend the meanings of "vacant".
She has more money than us.. oh gee. Well, I guess if my dad had more money than cells in his body then some of that MIGHT trickle down to me!
Also: http://www.theregister.co.uk/2008/10/27/hilton_financial_woes/
If I got paid twice a year's wages to go to a nightclub for an hour I'd find it exceptionally easy to be rich.
If you can type in this comment box you've already achieved a rank higher than "socialite".
Vacant:
1 : not occupied by an incumbent, possessor, or officer <a vacant office> <vacant thrones>
2 : being without content or occupant <a vacant seat on a bus> <a vacant room>
3 : free from activity or work : disengaged <vacant hours>
4 : devoid of thought, reflection, or expression <a vacant smile>
5 : not lived in <vacant houses>
Advert is taken to mean 4 (in relation to Hilton) but they can swing it they meant 3 (clearly 1-2 is what the advert is selling) (unless she's under employ as a socialite to an equally vacuous company.. but then they can plead factual mistake. No harm done.)