I would like to think Top Level Domain (.TLD) are the next best investment for the 21st Century celebrity.
The Kardashian family, particularly Kim Kardashian-West is the perfect example for the celebrity .tld.
Kim could register the .kim tld for $185,000 which is a tiny investment for the creation of an unlimited number of second-level domains (sld under the tld) and third level domains (thld).
blog.kim would be the address Kim's blog.
ig.kim could forward to Kim's Instagram.
tw.kim could forward to Kim's Twitter.
kuwtk.kim could forward to the Keeping Up with the Kardashians website.
app.kim could have a collection of her apps with this sld.
live.kim could be an interesting live show website for Kim.