Possible Clues:

• Eminem collaborator
• Death Row Records co-founder
• Titled rapper
• 'Nuthin' But a 'G' Thang' rapper
• Big name in rap
• Rapper with a professional title
• Rapper who sells earphones
• He was joined on stage by a Tupac hologram in 2012
• Rap superstar
• Rapper who co-founded Beats Electronics