Question: What American rapper has worked with drummer Travis Barker and fellow rapper Chamillionaire?
Sentence (from "LAX (album)"): Recording sessions took place from 2007 to 2008, with the production that were contributed by Cool & Dre, Kanye West, Scott Storch, Nottz, Hi-Tek, J.R. Rotem and JellyRoll; as well as guest appearances from Chrisette Michele, Common, Ice Cube, Keyshia Cole, Ludacris, Nas, Ne-Yo, Raekwon, Raheem DeVaughn, Travis Barker, Bilal and Lil Wayne.
Relevant evidence: No