Reality star Kylie Jenner has also reportedly pledged the same amount, after being criticised over her posts about the disaster.
The singer demanded the fan was "immediately" returned to her seat.
The Rocketman singer had previously suggested the late Wham! star was "uncomfortable" with being gay.
The Culture Club singer has dished on his supposed feud with the Queen of Pop.
The Rocket Man singer won an Oscar for Can You Feel The Love Tonight, which featured in the 1994 original.
The US chat show host and comedian insists she has the right to be friends with people with opposing political views.
"He couldn't seem to cope with adult company at all."
The Rocketman singer discusses the queen's sense of humour in an excerpt from his forthcoming memoir Me.
Elton John Says Infection Left Him '24 Hours From Death' As He Reveals Private Prostate Cancer Battle
The singer underwent successful treatment for the disease in 2017 but later suffered complications.
The US stars have joined Sir Elton in backing the royal couple after he hit out at “distorted and malicious” press reports.