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Kim Kardashian and Kanye West ring in 2013 in Las Vegas

Parents-to-be Kanye West and Kim Kardashian ring in

Parents-to-be Kanye West and Kim Kardashian ring in 2013 in Las Vegas. (Getty) (Credit: Parents-to-be Kanye West and Kim Kardashian ring in 2013 in Las Vegas. (Getty))

Whoa, mama!

A baby on the way didn’t keep Kim Kardashian from hosting a bash in Las Vegas on New Year’s Eve — or from rocking a sheer, curve-hugging frock that defied anyone’s expectations of maternity-wear.

Just a day after Kardashian, 32, and boyfriend Kanye West, 35, confirmed that they are expecting their first child together, the couple of nine months rang in 2013 at Sin City nightclub 1 OAK at Mirage Resort and Casino.

The reality starlet — who reportedly earned six figures for her party hosting gig — and rapper were joined by Kardashian’s mother, Kris Jenner, and close pal Lance Bass .

“[Kardashian and West] were very cute together and he was by her side the entire time, making sure she was OK,” said a source at the club, adding that Kardashian drank water all night.

Kardashian, 32, is reportedly about three months along.

West announced his girlfriend's pregnancy to the world during his concert in Atlantic City on Sunday night.

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