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The mom and daughters looked sweet in a classic cartoon costume
The actress, 32, shared photos on the holiday with daughters Ivey, 5, and Maddie, 15, with the three each taking on one of the Powerpuff Girls in a group costume.
The teen was Bubbles, with her little sister as Blossom and mom as the feisty Buttercup, all smiling as the family's black cat joined them in a picture.
The Zoey 101 actress also showed off her youngest's second costume, dressing up as Weird Barbie from Greta Gerwig's summer smash hit, Barbie. Other pictures from the day show Maddie also changed, dressing up as a cowgirl and laughing with a friend.
"Either you’re brainwashed or you’re weird”- Weird Barbie 👩🏻🎤👻👯♀️🎃🎀," she captioned the photo shared on Instagram Tuesday.
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In August, the actress posted a few photos of her daughters on her Instagram to celebrate the first day of school.
The youngest sibling wore a plaid dress and long white socks, holding a "kindergarten" flag while Maddie crouched next to her. In another photo, Ivey posed with Spears in front of the school's gate while clutching a stuffed dog in a matching plaid dress.
"Best part about having 2 kids at 2 different schools is that you’re too busy to cry about them growing up way too fast," Spears captioned the post. "Praying for a safe & happy school year ahead for all the students, teachers, coaches, and the many other staff members at every school around the world📚🙏🏻✏️."
Spears — who shares Maddie with ex, Casey Aldridge and Ivey with husband Jamie Watson — recently spoke with Entertainment Tonight, sharing her daughters have a special cameo in the Paramount+ film, Zoey 102.
"Having my two girls be a part of this film and get to make their little debut cameo, if you will, it was so special because they got to do it together," Spears said. "And also, my daughter's friend got to do it with her, who's like another child to me."
"Just seeing those two worlds collide, it was a really proud moment for me as a mom," Spears continued. "[Maddie] told me she liked what she saw — the set and saw the production and what it was," Spears continued.
"She was like, 'Mom, I can't believe that, like, they're all here because this is the movie that you've created.' And that made me feel really proud as a mom that she recognized that and saw you can do big things. It doesn't matter. And seeing her be a part of it was just, it was really a special moment."
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