Katherine St. Asaph

Topline writers like Sia shape the sound of pop most directly — and everyone from Rihanna to Halsey to Beyoncé has been impacted by the shape created by Sia's voice and songwriting.

Before they even released their debut album earlier this week, British electro-R&B duo AlunaGeorge were topping the British charts with a collaborative dance track called "White Noise." Now, the duo's full-length Body Music is out -- and it's getting some pretty positive attention. Katherine St. Asaph, who wrote about the band for MTV Hive, joins us to explain why the band is blowing up, and what the album holds.