Video surfaced on the internet shortly after the event (see below) showing Buffett walking near the edge of the stage before falling several feet to ground below.
Buffett's manager then took the stage and urged fans to leave the auditorium, the Hordem Pavillion.
He was taken to Sydney's St. Vincent's Hospital where sources say the results of a CAT scan showed no significant damage. TMZ says Buffet was "doing well," signaling his quick release.
Wednesday night's concert was Buffett's fifth and last in Sydney on his current tour.