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It's hard to miss the resemblance between Kim Zolciak-Biermann and Brielle Biermann.

"It's a little creepy," the Don't Be Tardy star told E! News about twinning with her 19-year-old daughter. "She is my daughter, but it's still a little creepy."

Brielle doesn't mind the comparisons, though—she's extremely close with her famous mama. "There's not like a daughter-mom boundary," Brielle explained. "I can tell you anything."

Kim reminded Brielle that she'd "always be your mom," but said she provides her mini-me "guidance" so that she can make her own decisions. "I try to educate her," Kim explained. "She's almost 20 years old, and so I give her advice about her boyfriend or about a job opportunity or about an Instagram post...I give her the advice, and what she does with it is her own business."

Kim fully understands that Brielle is an adult and gets to make her own decisions—cosmetic procedures, included.

"Brielle did have her lips done," said Kim. "She's been talking about her lips for, I don't know, since she was 14 years old. I said, 'Brielle, when you're an adult, when you're an adult, when you're an adult...' Well guess what? She's 19...and I did mine, too, so what am I going to say?"

"I want Brielle to feel beautiful about Brielle," Kim continued. "It's not for anybody else, and I'm completely supportive, and she's an adult...I want Brielle to feel great about Brielle."

For more from Kim and Brielle on their unique relationship, plastic surgery rumors and what's really going on with Kim's husband Kroy Biermann's career, watch the clips above.

Season 5 of Don't be Tardy premieres tonight at 10 pm on Bravo

(E! and Bravo are both members of the NBCUniversal family.)