Apple’s revamped music service -- expected to be unveiled during Apple’s 2015 Worldwide Developers Conference next week (June 8-12) -- has at least two confirmed faces: Drake and Pharrell Williams, according to multiple sources familiar with negotiations. Billboard first reported the news in April, which Williams all but confirmed several days later when he was spotted wearing a pre-retail Apple Watch during the April 6 telecast of The Voice.

Details of the artists’ respective involvement is unclear at this time, though a May 31 report from the New York Post suggested that Drake, Pharrell and David Guetta would be three of several celebrity “guest DJs" for a revamped iTunes Radio, the result of a year’s worth of integration with Jimmy Iovine and Dr. Dre’s Beats By Dre, purchased late last May for $3 billion.