SiaPhoto: YouTube

After teasing her new single, "Alive," on social media this week, Sia has finally shared the song -- and we have it exclusively for you on our iHeartRadio Snapchat Discover channel, where you can hear the whole thing!

"Alive" is the lead single off of Sia's upcoming album called This Is Acting. The song was originally written for and with Adele and co-writer Tobias Jesso Jr., according to Billboard. And in an interview with RTV Slovenija, Sia revealed that Adele had rejected the track, and told the outlet, "I now sing a song from [Adele’s] perspective."

In fact, Sia named her new album This Is Acting, because they are songs that she wrote for other artists from their perspective. In an interview with NME, she said: 

"I'm calling it This Is Acting because they are songs I was writing for other people, so I didn’t go into it thinking, 'This is something I would say.' It's more like play-acting. It's fun."

The "Alive" cover art features the blonde wig Sia famously showcased in her previous music videos starring Maddie Ziegler, except it's dyed half black.

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Head to iHeartRadio's Snapchat Discover channel NOW to hear Sia's "Alive."