Sophia Somajo Diamond Heart

Britney's Not-So-Secret Songwriter Sophia Somajo Has an EDM Hit With Alan Walker

You might not know Sophia Somajo (or Soso) by name - unless you're a true pop nerd, and/or a fellow PopJustice stan - but you most certainly already know some of her work. Under her own name and, much more often, pseudonyms like Tiffany Amber, the Swedish singer-songwriter has co-written smashes…