Reductive

No. She has her own unique sound for which I LIVE. Don't know who Greg is but hope it doesn't sound generic.

this could be for someone else.

she didn't mention anything about writing for someone else, so NO!

Could this be for Beyoncé? I remember the both of them being rumored for '5'.

They are working together for a long time and it's for her album. Billboard interviewed him for Pink's cover story and he said he was really excited about his work with Sia and that she was finally gonna break through in the US. They are posting studio pics for a long time too.

Not Greg!

Stronger was so generic and Blow Me was annoying!

If he's gonna produce a song with her, he better make it magical like Try.

all she said was "smash"

I'm not attacking you or anything, she's just the "it" writer right now so I was thinking it could be another artist. plus I thought she said a while ago that she was done doing solo stuff, but maybe that's wrong.

For those of you questioning him working with Sia, their work can be really great. My favorite song of hers EVER is Death By Chocolate, and he co-wrote it with her.

Theyre obviously working together to write Kelly that song Sias been wanting to give her.

Me too

I LOVED his work on We Are Born and It's Not Me, It's You. Can't wait to hear more songs from him...sung by the incomparable Sia of course

Greg is really hit/miss.
His work with Lily Allen & the Shins is amazing. Also a few of his songs with P!nk & Peaches are great.