It looks like Maddie Ziegler had one birthday she is definitely going to remember for a very long time. The Dance Moms star was surprised by Australian singer Sia with two very huge gifts she sent to her on her special day.

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Ziegler, who turned 12 this week, shared a photo of the gifts she received from Sia, which includes a life-sized Hello Kitty balloon.

The dancer shared the photo on her Instagram account on Wednesday and captioned it with, "Thank you so much Sia for the birthday balloons! Love you so much also thank you to everyone for the birthday wishes yesterday."

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Earlier this summer, Ziegler revealed that Sia was "star struck" when she first met her on the set of her hit music video for "Chandelier."

Maddie told Vulture: "The first day I met her, she just came up and gave me a giant hug and said, 'I can't believe I'm with you right now! I'm such a big fan.' It was just so funny because she's a really big star and really successful singer and everything, and I couldn't believe that she was fan-girling over me."

As far as how she landed the role in her new video, Maddie says that Sia reached out to the show via social media. She said, "Sia was a fan of our show. She actually tweeted us, "Hey, Maddie, would you like to be in my new video for my new song Chandelier? I was just like, whoa, this is pretty cool."

Sia, who is notorious for staying out the spotlight and refusing to be photographed, joined Maddie for a performance of Chandelier during a taping of The Ellen DeGeneres Show in May. During the routine, the singer kept her back to the camera while Maddie dove into her dance routine for the audience.

Tags: Dance Moms Reality TV lifetime Maddie Ziegler