Tupac Shakur: Even with 15 years gone, Tupac Shakur is still relevant in hip-hop and always will be.

Billy Garland: BILLY GARLAND, 'Pac's real pops, remembers his son.

Keisha Morris: Tupac's first and only wife looks back at their bond.

Leila Steinberg: Tupac's first manager reflects on their history.

Johnny "J": He committed suicide under twisted circumstances. XXL considers the life and death of 'Pac's hit beatmaker.

And... Outlawz, Mutulu Shakur, Game, Lil Wayne, Royce Da 5' 9", Ace Hood and Ferrari Boyz.