Some might say the beef between Jay-Z and Nas produced some of the best battle songs in rap history with the "Takeover" and "Ether." 

Their collabs after that have gotten a lot of attention too, whether it was the cut "Black Republicans" "Success"  or "BBC."

Nas' song "The Scientist," produced by Just Blaze, has been living on the Internet for almost 10 years. But a version with Jay-Z's vocals on it was recently leaked.

"Hovito Brigante, my own people that got me / That’s what I get for snoozin’, moving too sloppy / I’m back brilliant, my brains is back in the building / The lights back on the fridge, you dig?” spits Jay in the snippet.

What's your favorite Jay-Z, Nas collab?