Kim Zolciak is at it again! First it was lip fillers and now she's plumping up her butt!

The reality star showed off her butt when she shared an up-close-and-personal during a visit to the Kardashian's skin guy, Dr Simon Ourian, in Beverly Hills.

The doc, who runs Epione, is seen injecting the 38-year-old's bottom in the Instagram vid. In it she's she also revealed that she's documenting a cellulite-removal treatment called OptiLipo . Lucky us!

In the vid, we see the mom of six lying on a table in a black bodysuit. Her face is away but that's not really what we're focused on -- it's all about the butt!

It seems like the blonde has been on a filler kick, since last week we spotted her at LAX with a seriously puffed-up pout. It almost looked like someone had hit her in the mouth. After comments flooded the Internet, she posted a video in which she admitted she'd gotten fillers. She said in a video, "I went to Dr Kassabian, I got some Botox."

Kim also added, "I haven't done plastic surgery. I got fillers in my lips and Botox."

Stay classy, Kim.