Analysis The superstar's US sales so far point to a promising result for Sony News UMG and Sony execs discuss 'value gap' News Sony and Warner are set to follow suit in the coming months - ready for a summer showdown Analysis Digital takes 61% of market - as download continues to dominate News Lionel Richie, Elvis Costello and Christina Aguilera have all signed petition Analysis Per-stream figure dropped 24% in 2015 across free and premium Analysis Ad-funded makes up just 16% of total streaming tally Analysis 'YouTube boasting about its payments to the music industry is like Bernie Madoff boasting about paying dividends to his investors.'