Today, I checked out both Rihanna's "original" version and the one by Sia, but neither of them impressed me. Not really but, but nothing to write home about. So for me, this is actually all about the musical arrangement, and the one by Andy Rehfeldt for "Diamonds" is fantastic (in my book). Someone of the big stars should hire him and have him rearrange an entire album, some kind of alternative version."Diamonds" was written by Sia who I actually quite enjoy, you should check her out, maybe you'll hear in her music what you hear in the Rihanna song.