"Dance Moms" star Maddie Ziegler recently showed her younger sister Mackenzie some support by promoting the latter's new Christmas single "Sleigh Ride."
On Twitter, the 13-year-old Sia dancer shared a photo of her sister's iTunes cover.
"Everyone go download @mackzmusicinc new cover on iTunes for Christmas!!" she wrote. The photo also showed the younger Ziegler.
As of late, more than 1,000 fans have already liked the post.
Meanwhile, Ziegler officially returned to "Dance Moms" season 6 for episode 7.
The "Chandelier" dancer has already missed five episodes and competitions with her ALDC teammates because of her upcoming movie "The Book of Henry."
According to the show's spoiler site, Ziegler's New York City filming wrapped up last week.
One fan video posted on Instagram also showed Ziegler performing with her teammates Kendall Vertes, Kalani Hilliker, JoJo Siwa, Brynn Rumfallo, Nia Frazer and Mackenzie.
Instagram user @dancamomofficialspoilers wrote, "Clip of the ALDC group dance at today's competition. I don't know what it was called but they placed 1st in their division, don't know the overalls."
The spoiler site revealed that the title of their contemporary dance performance was "Well Oiled Machine."
The cast of "Dance Moms" won't have a competition this weekend. Abby Lee Miller's young dancers will return to the stage to compete on Dec. 5 for the Dream NDC in San Diego, California.
A day after the event, Siwa will also hold a special Holiday gathering called "JoJo's Holiday Dance Spectacular!"
"Dance Moms" season 6 will premiere on Lifetime on Jan. 5, 2016.