They have become musical soulmates according to some. But who has the most to gain (and lose) from their friendship?

The content previously published here has been withdrawn. We apologise for any inconvenience.

READ THIS ARTICLE FOR $15
$15 provides access to this article and every case-study, interview, and analysis piece that we publish for the next 30 days. Our Premium Subscription also provides access to a database of over 100,000 articles on innovation in brand, customer, and retail experience.
Already a subscriber? Log in