On Tuesday, leaders at the international advocacy organisation announced that the Coldplay frontman and The Greatest Showman actor will spearhead the "thought leadership" NOW event, which is scheduled for 27-28 April. Neither Martin nor Jackman have yet commented on their roles at the summit. However, a Global Citizen spokesperson promised that the conference will be focused on "turning ideas into impact and driving urgent action to end extreme poverty". "Convening the brightest minds and leading voices across all spheres of society, from world leaders to grassroots activists...