Kim Kardashian Kourtney Kardashian Mason sisters baby

The reality TV starlet had a b-day celebration in Sin City and then in New York City last night, so where will she celebrate next?

Kim Kardashian, who doesn't officially turn 30 until this Thursday, is seen above arriving back in the Big Apple from JFK on Saturday before partying at TAO later in the night...

Today, Kim K. posted a pic on her Twitter page of her favorite man in the whole wide world:

kimknewmason.jpgpic courtesy of Kim's Twitter

How adorbs is Mason! "Chillin' with my man on this lazy sunday!" reads the caption.

Meanwhile, think the future star of Kourtney and Kim Take New York will pose nude for a third time? Kim says no way! "I'm too old for that now, I wanted to get it all out of my system before I turned 30," claims the reality star. Boo!