Sia boldly stood up to someone trying to sell fans photographs that showed her naked. 
 
 After becoming aware that the photographs were being offered for sale, the singer posted one of the images on Twitter Monday night. 
 
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 “Someone is apparently trying to sell naked photos of me to my fans. Save your money, here it is for free. Everyday is Christmas!” the 41-year-old wrote, explaining the bold move. 
 
 While a serious matter, the Tweet was also a reference to her new album “Everyday is Christmas”. 
 
 Unlike other nude celebrity photographs that have come up for sale after their phones were hacked, Sia’s appears to be snapped unbeknownst to her while she was outside some sort of residence. 
 
 PEOPLE could not immediately reach a representative for the songstress Monday. 
 
 RELATED VIDEO: Sia Goes Without Her Wig as She Reveals Her Face (and Her Breast) in Instagram Post 
 
 The “Titanium” singer isn’t afraid to show off her body either, giving fans an eyeful in early October when she appeared on a friend’s Instagram wearing a white rob with her breast bared. 
 
 Sia’s make-up artist, Tonya Brewer, shared the photo of the singer, writing in the caption, “she just directed her first film. she had no idea her boob was out. thank you for letting me create magic with you @siamusic.” 
 
 While Sia’s left breast was exposed from under her white robe, a banana emoji helped keep some of the star’s chest private. 
 
 Holding up two fingers in a peace sign, while holding a white towel in the other hand, Sia looked relaxed as she also indulged in a green face mask. 

 Singer takes on apparent attempt to sell naked image of her by publishing it on her Twitter account 
 
 Sia Furler, the notoriously private Australian singer and songwriter, has reacted to an apparent attempt to sell naked pictures of her – by publishing the image herself on Twitter. 
 
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 The singer, who regularly obscures her face with masks, wigs or even a paper bag when in public, posted the picture in a cheerful tweet that read: “Someone is apparently trying to sell naked photos of me to my fans. Save your money, here it is for free. Every day is Christmas!” Sia has a Christmas album coming out soon. 
 
 How to style out a naked photo leak: Sia’s approach is just one of a few options Read more 
 
 The post suggested that a picture agency was attempting to sell 15 images of the singer, including at least one of her nude. It’s not clear to whom the photos were being offered, and whether agency FameFlyNet, whose water mark was on the photo, was the would-be seller. The Guardian has approached the company for comment. 
 
 Sia’s fans reacted to the tweet with glee. 
 
 Adele Union (@AdeleUnion) SIA I’M SCREAMING pic.twitter.com/ZUY03DFnsE 
 
 Although she is one of the most successful songwriters in the world, writing hits for Rihanna, Beyoncé, Katy Perry and Adele and selling millions of her own records, Sia has always been fiercely protective of her privacy. 
 
 
 
 In a series of recent clips and televised performances, she enlisted child dancer Maddie Ziegler to appear as a surrogate of sorts. 
 
 And in 2013, she perplexed fans by appearing in a behind-the-scenes video with a bunch of bananas superimposed across her face. 
 
 
 
 “If anyone besides famous people knew what it was like to be a famous person, they would never want to be famous,” she wrote in a piece for Billboard called My Anti-Fame Manifesto.
– Sia is offering a holiday gift that's one part diss and one part whip-smart self-promotion: a picture of herself in her birthday suit. The 41-year-old singer released the combination preemptive strike/album promotion after she found out someone was trying to sell naked photos of her, People reports, said to be taken on the sly while she was walking around in the buff outside a residence. "Someone is apparently trying to sell naked photos of me to my fans," Sia tweeted Monday, along with a photo of her uncovered backside. "Save your money, here it is for free. Everyday is Christmas!" Some may have been surprised by her move, as the Guardian notes Sia is "notoriously private," but it just so happens Everyday Is Christmas is also the name of her upcoming Christmas album, so … +1 Sia?