Robert Conley, Ben Conrad(assistant), David Frazer, Jim Gaines, Stephen Hart(additional), Justin Lieberman, Brian Montgomery, Scott Holderby(assistant), Eddie Kramer, Michael Rosen, Michael Rosen(assistant), David Luke(assistant), Abibou M'baye, José Gaviria, Juanes(assistant), Andres Munera, Tone, John Hanes(additional), Scott Moore(assistant), Jesse Nichols(assistant), Tim Roberts(assistant), will.i.am, Joe Wohlmuth, Josh Connolly(assistant), Dave Diffin(assistant), James Krausse, Bill Malina, Jim Reitzel, Jon Belec(assistant), Juan Losada, Lester Mendez, Elias Ponce(assistant), Christine Sirois(assistant), Pat Woodward(assistant), Phil Tyreman(assistant), Dan Vickers, Scott Cooke, Tim Roberts(additional, assistant), Chris Shaw, Sang Shin(assistant), Bo Boddie, Peter Wade Keusch, Greg Price(assistant), Jose Sanchez, Stephen Hart, Jeeve, Greg Collins, Chris Garcia, Kieron Menzies(assistant), Alan Veucasovic(assistant), Randy Wine, Izzy Maccio(assistant), Danny Ponce(additional), Jimmy Sanchez(assistant), Ron Taylor(additional), Rob Jacobs, Jeff Rothschild, Josh Connolly, Michael Anderson(additional, assistant)

Serban Ghenea, Joey Moi, Boris Milan, Jim Gaines, Kevin Mahoney(assistant), John Shanks, David Bianco, Tim Roberts(assistant), Tony Maserati, Mike Couzzi, Andres Munera, Klaus Derendorf, Jeeve, Jeff Rothschild, Dan Bucchi(assistant), Dana Nielsen, Bill Malina(assistant), Manny Marroquin, Peter Wade Keusch, Bruce Swedien, Eric Schilling, David Frazer

Dan Shea, Citizen Cope, Lester Mendez, John Shanks, Klaus Derendorf, Jeeve, Dallas Austin, Rick Rubin, Emilio Estefan, Jr., Walter Afanasieff(lead vocals), Benny Rietveld(additional), Carlos Santana, Walter Afanasieff, Chad Kroeger, Joey Moi, John Shanks(additional), Michael Shrieve, Desmond Child, Jamie Houston, Alex Ander, José Gaviria, Andres Munera, Kike Flavio Santander, Fernando Tobón, Dante Ross, Rick Nowels, Richard Supa(additional), Lester Mendez(additional), will.i.am, Cory Rooney