To Nia Sioux , fellow Dance Moms OG Chloé Lukasiak is certainly not replaceable.

Musing on the costars she's still in step with, the 24-year-old told E! News in an exclusive interview, "I see Chloé quite a bit because she's in New York."

While UCLA grad Nia is based in Los Angeles, every time she makes a trip to the East Coast, "We'll try and get together for a second," explained Nia, noting that she had a date with her childhood bestie to watch Misty Copeland 's final performance with American Ballet Theatre Oct. 22.

And the two were set to perform a duet of sorts Nov. 3, with the Bottom of the Pyramid author kicking off the book tour for her forthcoming memoir in NYC.

"Chloé wrote the foreword for the book," noted Nia, "which is really, really, really special."

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