The inclusion of and Ice Cube alongside 2Pac and Snoop Dogg on this specific remix is a product of internet "what-if" culture.
The original "California Love" was released in 1995 as 2Pac’s debut single for after his release from prison. It was famously produced by Dr. Dre and featured talk-box vocals from Roger Troutman . Original Version: Featured 2Pac and Dr. Dre.
Eazy-E passed away in March 1995, months before "California Love" was even recorded. Any version featuring his vocals uses recycled verses from other songs.
2Pac ft. Dr. Dre - California Love (Official Video) [Full Length Version]