…Madonna also had work done in PatchWerk’s Studio 9000 this past October. Madonna had songs mixed by Leslie Brathwaite, assisted by PatchWerk engineer Brian Pedersen. In September 2009 Madonna released Celebration, her third greatest hits album, and closing release with Warner Bros. Records. It contained the new songs “Celebration” and “Revolver”, plus 34 hits spanning her career.
source: thehypemagazine / madonnafanzine