Maddie Ziegler announced the launch of her fashion line Friday and while her ex coach and “Dance Moms” co-star Abby Lee Miller made it known she was thrilled for her former student, Abby also used the time to vent about their failed fashion project.

Before Maddie, 13, posted a video to her YouTube page explaining her upcoming clothing line to viewers, Abby shared three videos of her own, the most recent posted on Thursday, which included never-before-seen footage of Maddie and her sister Mackenzie, now 12, dancing around a factory to Madonna’s “Vogue,” among other hits. Abby explained the videos were planned to be used to promote her “upscale, innovating” children’s clothing line that never came to be.

“Who better to fit kids? I had been designing costumes for years, I know fabrics and fit, so I partnered up with a savvy Stylist to the Stars, some faithful friends that know quality high end fashion, and two of my favorite kids to be the faces of the brand, Maddie & Mackenzie of course - I'd been picking out cool outfits for them for years,” she wrote.

Abby said that with her “perfect team in place” they shot the footage in the warehouse where the garments, described as “well-made classic clothes to fit the trendy tween,” were set to be manufactured, but the project fell apart before the promos could see the light of day.

“Sometimes in business, things happen, maybe somebody changes their mind, loses one of their favorite shoes, or gets a better deal? I'm still on my mission to supply exquisite apparel for the girl who always wants to be the best dressed at the ball!” Abby wrote before going on to wish Maddie “all the best” with her new venture.

Maddie explained in her YouTube video that she launched “Maddie” due to her desire to tap into the sporty, comfy and cute market.

“There’s a gap, I feel, because kids clothes are either too childish or something I would never wear,” she said. “Sometimes adult clothes are either too big on me or its just too grown up for me.”

The 30-piece collection, made with dancers on-the-go in mind, and featuring everything from jackets to jeans, will be available for purchase in girls and junior sizes at select Nordstrom locations Oct. 10 on maddiestyle.com Oct. 3.