John Mayer – vocals; guitars; keyboards; sound effects; percussion; production; art direction; graphic design
Steve Jordan – drums on all tracks; percussion on tracks 5, 6, 8, 10 and 11; production
Pino Palladino – bass on all tracks except 2, 7 and 8
Sean Hurley – bass on tracks 2, 7 and 8
Ian McLagan – Hammond organ on tracks 5, 9 and 11; Wurlitzer electric piano on tracks 5 and 8; piano on tracks 10 and 11; pump organ and celeste on track 4
Jamie Muhoberac – keyboards on tracks 1 and 9
Robbie McIntosh – guitar on track 2
Waddy Wachtel – acoustic guitars on track 3
Bob Reynolds – saxophone on track 11
Bryan Lipps – trumpet on track 11
Taylor Swift – vocals on track 3