You only hit thirty once, so Paris took her somewhere even the most mature people can go crazy and act like
kids 21-year-olds - Las Vegas!
They spent the weekend gambling, partying, and celebrating with not one, not two, but THREE amazing cakes! How do they keep their figures?
"What a wonderful weekend celebrating my gorgeous sister @NickyHilton's Birthday! So proud of my sis, look up to her so much. Such a beautiful person both inside & out."
Awww! Aren't sisters great? Also, isn't cake great? Yum! Happy Birthday, gurl!
[Image via Instagram.]