It might be the holidays, but it looks as though Abby Lee Miller is hard at work. The controversial Dance Moms star is spending her Christmas Eve with the Ziegler family as she is helping young Mackenzie promote her music during the holiday season.

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In a new photo she shared on Wednesday morning, it looks as though Miller is accompanying Maddie's younger sister during her media tour in New York City. She captioned a photo of Mackenzie with, "Don't miss #MackZ @officialmackzmusic performing her hit #ChristmasAllYearLong on Good Day NY today."

Meanwhile, Miller is sporting a new, healthier look these days. The reality television star has lost a significant amount of weight as shown in several new photos she posted on her Instagram account during the Thanksgiving holiday.

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In one photo, a very slim-looking Miller is posing in her kitchen along with a pony. She captioned the photo with, "My pretty pony @ponypearl7 was our Thanksgiving hostess with her mama @lindamedvenestyling #aldc #aldcla."

Many of her followers have noticed her new look by commenting with, "Abby you lost so much weight, good for you," along with, "Keep up the good work Abby you look great."

Tags: Dance Moms Reality TV Bravo