Rob Kardashian, Kris Jenner

Denise Truscello/WireImage

When you think of having a birthday bash in Las Vegas, you might not think to bring your mom...but Rob Kardashian does!

The E! star and entrepreneur partied in Vegas at the 1OAK club for his 26th birthday, and made sure that Kris Jenner was there for some of the fun. As you can see, mama Kris made sure Rob got a cake for his B-day!

"Happy Birthday Robert I love you!!!" tweeted Kris. "You are the biggest blessing and I'm so proud of you!"

Kris should be proud: Rob recently launched his new line of designer socks, Arthur George, and he even committed to losing 50 pounds by starting a new diet and exercise program.

In fact, part of the reason Rob was in Vegas at the Mirage was for a signing to promote the Arthur George line. Of course, living it up at one of Vegas' hottest clubs was probably a big reason for the trip too!

You can see more of the Kardashians every Sunday at 9/8c on new episodes of Kourtney & Kim Take Miami, only on E!

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