There's a KimYe baby on the way!

Kim Kardashian and Kanye West** will have something extra special to toast to when they ring in 2013 at the stroke of midnight January 1: They're expecting their first child in the new year.

Performing a Dec. 30 show at Revel Resort's Concert Hall in Atlantic City, N.J., dad-to-be West, 35, couldn't contain his excitement and shared the couple's happy news with the audience of 5,000.

"Stop the music for a second. Can we make some noise for my baby mama?" a beaming West said during a break in the show, referring to his girlfriend in the audience. (Watch video above)

Dedicating a song to his three months pregnant girlfriend, 32, West was overjoyed as he sang lyrics including "this is God's plan" and "we are having a family," a source at the concert tells Us Weekly. "Then as he was singing the last song and the crowd wouldn't let Kim out, he stopped the music and asked that his baby mama could leave safely!" added the attendee.

Longtime family friends, Kardashian and West took their romance public in March 2012. "It's so nice to have a best friend in this game who understands everything you're going through," Kardashian -- who is still legally married to Kris Humphries **-- gushed of West November issue of England's Tatler magazine. "I can't even think about being with anyone else than the man I'm with."

This article originally appeared on Usmagazine.com: Kim Kardashian Pregnant: Watch Kanye West Announce Their Happy News!