Ready to ring in what's suddenly lined up to be quite the year ahead, Kim Kardashian was joined by her soon-to-be babydaddy, Kanye West, while playing hostess at a New Year's Eve bash in Las Vegas on Monday night (December 31).

Fresh off of a flight from Los Angeles, the expecting E! reality star showed off her barely-there baby bump in a semi-sheer, black frock as she and her rapper beau greeted guests at the $125 per head fete held at 1 OAK Las Vegas at The Mirage Hotel & Casino.

Tweeting about the NYE plans hours prior to the swanky Sin City soiree, Miss Kardashian excitedly wrote, "Heading to 1Oak tonight! So happy to be surrounded with all my friends & some of my fam! Gonna be a fun night!"

As previously reported by GossipCenter, Kanye made the headline dominating announcement that he and his 33-year-old brunette beauty are set to be first time parents - with the baby on board revelation occurring during his Sunday night concert in Atlantic City.

Describing herself as "lucky" and "blessed," Kim took to her website to confirm the big news, writing, "It’s true!! Kanye and I are expecting a baby," adding, "Looking forward to great new beginnings in 2013 and to starting a family. Happy New Year!!! Xo"