Linkin Park & Jay Z: Numb/encore [live] -

How did that collaboration between Linkin Park and Jay Z happened?

"Numb/Encore [Live]" by Linkin Park and Jay-Z, famously performed for MTV's Ultimate Mash-Ups , is a landmark collaboration from their 2004 Collision Course EP. This Grammy-winning track, which reached over 1 billion Spotify streams, was highlights with live performances at Live 8 (2005) and the 2006 Grammys with Paul McCartney. Numb/Encore [Live] - Linkin Park & Jay Z