Sheer ignorance:

Nathan, if you want to write an article about 2Pac, it would help greatly if you knew what you were talking about. Eminem didn't put 2Pac and Notorious BIG on a song together, they actually recorded it together for "One Million Strong":

That's some quality journalism there Steven, even if you are just citing Billboard. Tha Dogg Pound's "Dogg Food" was released on Death Row/Interscope, the same label as Dr. Dre's "The Chronic," Snoop's "Doggystyle," and 2Pac's "All Eyez On Me."