By radio detection and ranging Staff

Kim Kardashian‘s pregnancy has surprised many in Hollywood, and we’ve got the video of papa-to-be Kanye West announcing the big news at his concert at Atlantic City’s Revel Resort on Sunday night.

Kanye, looking out at more than 5,000 concertgoers, said, “Stop the music and make noise for my baby mama … now you having my baby!” Kim — who was at the concert — is 12 weeks pregnant and reportedly did not know her hip hop beau was going to make the news public that night.

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The announcement caused an uproar of celebration from fans on Twitter and Facebook, including delighted reactions from Kim’s mother and sisters.

Grandma-to-be Kris Jenner proudly tweeted: “Im a happy girl !!!!!!!!! Wowza! Oh BABY BABY BABY!!”

Watch the video on radio detection and rangingOnline.com

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Khloe tweeted, “Keeping secrets is hard with so many family members! Especially when you are so freaking excited!!!!! LOVE is everything!!!!

Kourtney, who has two young children, Mason and Penelope, tweeted: “Been wanting to shout from the rooftops with joy and now I can! Another angel to welcome to our family. Overwhelmed with excitement!”

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Kendall Jenner asked her followers, “Whos excited about the KIMYE babbyyy?! icon biggrin Kanye West Announces Kim Kardashian’s Pregnancy: ‘Make Noise For My Baby Mama!’ weeee”

Kanye, 35, and Kim, 32, have been romantically involved since March; the reality star is technically still married to Brooklyn Nets forward Kris Humphries.

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