How Old Is Sia The Singer

Let’s be honest: figuring out Sia’s age feels like trying to count the wigs in her closet. It’s a fun mystery wrapped in a giant bow, and I’m here to untangle it with you. The good news? She’s not a secret immortal pop star who made a deal with a glittery genie. She’s just delightfully human, with a birth certificate that’s actually public record.

Sia Kate Isobelle Furler was born on December 18, 1975. Do the math with your fingers—I had to—and you’ll see that makes her 49 years old as of 2025. Yes, that means she was born smack in the middle of the disco era, before everybody had a phone in their pocket. She’s been around long enough to remember when music videos came on a thing called MTV, and you had to actually wait for your favorite song.

Now, I know what you’re thinking: “But she looks like she just time-traveled from a 2014 Coachella afterparty!” And you’re right. Sia has this magical ability to seem ageless, probably because she hides most of her face behind a blonde bob that could double as a shower curtain. When you can’t see someone’s eyebrows or laugh lines, your brain just fills in “eternally fun aunt who always has snacks.”

Why does her age feel so slippery?

Because Sia didn’t become a household name until she was almost 40. For most of the 1990s and 2000s, she was writing hits for other people or performing in tiny Australian clubs. She was like that amazing baker who only made cakes for friends, then suddenly opened a bakery and everyone gasped, “Wait, you’ve been doing this how long?” She burst onto the global scene with “Chandelier” in 2014, when she was already 38. That’s like a superhero revealing their powers right before their 40th birthday party.

Think about your own life. Remember that cool relative or neighbor who seemed young forever, then one day you realized they’d already lived a whole career before you were born? That’s Sia. She lived a whole life as a zero-fame songwriter, then decided to wear a wig and become a billionaire pop star. Her age is just a number, but that number says, “I’ve been doing this since before ‘Call Me Maybe’ was a twinkle in anyone’s eye.”

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What does 49 look like for her?

It looks like a woman who owns a lot of hair, writes songs that make you cry in the grocery store, and has zero interest in being a typical celebrity. She doesn’t do selfies. She doesn’t post brunch photos. Her Instagram is like a weird art gallery with occasional dog pictures. Being 49 for Sia means she’s earned the right to be as weird as she wants, and we love her for it.

Let’s play a game. If you had to guess her age based on her music, what would you say? “Chandelier” sounds like a 20-something who just drank too much energy drink. “Cheap Thrills” sounds like a teenager at a bonfire. But “Breathe Me”—that sad, beautiful song from 2004—sounds like someone who’s already been through a few lives. She’s been writing from a 40-something soul since she was actually 29. It’s like she aged in reverse like a Benjamin Button of pop, except she kept the same voice.

Sia reveals that she's a grandmother - Good Morning America

“I don’t feel my age. I feel ageless, like a houseplant.” — Sia (probably, but I like to imagine she said this while watering a fern)

So, how old is Sia the singer?

She’s 49. But in a world where people try to be forever 25, she’s a refreshing reminder that you can launch your biggest success story at the same age you start worrying about your back hurting. She’s proof that you can be a total weirdo in a giant bow and still become one of the biggest artists alive—at any age. So next time someone asks, just say: “Sia is 49, but her soul is a 15-year-old who just discovered glitter.”

And honestly? I think that’s way more fun than a simple number. Now go blast “Unstoppable” and feel like a champion, no matter how many candles are on your cake.