It's confirmed that Sia wrote a song on Kelly's new album, Piece by Piece.

"Invincible” (Warren Felder/Sia Furler/Steve Mostyn/Jesse Shatkin)

Confirmed lyrics so far:
"Now I am invincible
no I ain’t a scared little girl no more
Yeah I am invincible
what was I running for
I was hiding from the world
I was so afraid I felt so unsure
Now I am invincible and I’m a perfect storm"

Source: http://www.mjsbigblog.com/kelly-clar...escription.htm

Yas

This is gonna be huge hopefully. Kelly has the voice the sing a powerful Sia song. Hopefully its a power ballad....

This is reliable? YASSS

uptempo smash

Her Double Rainbow is coming

Now I am invincible and I'm a perfect storm

Kelly's vocals are perfect for Sia's writing.

Yas

Same old sis, same old themes. So boring

Single #2.

So are your comments in every thread with her name on it.
Let it go

Love the "huge storm" part. A great chorus will come after that word

itd better be not

Like...why even comment when its pretty clear you're hating everything she does?

Clock the pressed soul

This will slay!