Jewell worked with Jay Z.
Jewell ( a.k.a. Ju-L , born Jewell Caples , June 15 , 1968 ; later Jewell Peyton ) is an R&B singer who was signed to Death Row Records from 1992 to 1996 . `` Numb/Encore '' is a song by American rapper Jay Z and rock band Linkin Park from their album Collision Course ( 2004 ) .