Off the upcoming 'Southpaw' soundtrack.
Mary J. Blige, Common and Train are also scheduled to perform.
Music stars who rose to fame with the beatmaker's signature production.
Plus, pics of Beyoncé, Drake, Kevin Hart, Trey Songz and more.
India.Arie, Russell Simmons and others celebrate this week.
Pop singer in Miami recording with Neptunes producer, will choose single next week.