Kim Kardashian and Kanye West rang in the New Year with a kiss as the ball dropped at midnight.

The couple was in Las Vegas to host a party at 1 Oak Nightclub, and Kardashian reportedly made $300,000 for her appearance.

(View pictures here.)

Dressed in a sheer black lace dress by Julien McDonald, and wearing minimal makeup, Kardashian shunned her typical-figure hugging and cleavage-baring dresses of previous years to ring in the New Year. Her baby bump was not even visible, though she is three months pregnant and expected to give birth at the end of June.

West and Kardashian looked ecstatic all night, and the rapper often had his arms around Kardashian’s stomach.

While West was performing at Revel in Atlantic City, N.J., Sunday night, he made the sudden pregnancy announcement. West stopped in the middle of rapping to say “make noise for my baby mama right here,” causing the 5,000 audience members to shout and applaud.

Though she is pregnant, Kardashian is showing no signs of slowing down just yet, as she hosted the New Year’s Eve party at 1 Oak.

On her blog on Monday, Kardashian confirmed West’s pregnancy announcement in a post titled 'New Year, New Beginnings'.

“It’s true!! Kanye and I are expecting a baby. We feel so blessed and lucky and wish that in addition to both of our families, his mom and my dad could be here to celebrate this special time with us. 

"Looking forward to great new beginnings in 2013 and to starting a family. Happy New Year!!! Xo”

West lost his mother Donda West in 2007 at the age of 58 after complications from plastic surgery, while Kardashian’s father Robert Kardashian passed away in 2003 at the age of 59 after losing his battle with esophageal cancer.

This will be the couple’s first child together. They have been dating since April.