'Saddens me': Lewis Hamilton's 'unbelievable' Australian bushfire donation

British Formula One driver Lewis Hamilton has shown he is a champ on and off the track after donating $500,000 to the Australian bushfire appeal.

Hamilton, who is an environmental activist, has often expressed his love for animals and said he was shocked to hear about the devastating bushfires in Australia.

'SOLD!’: Shane Warne's baggy green caps sets insane milestone

The F1 champ made the announcement he would donate $500,000 (Friday AEST) and urged others to donate to the cause.

“It saddens me deeply to know that over 1 billion animals in Australia died a painful death, no way out, not their fault,” he wrote on Instagram.

“My love of animals is no secret and I can’t help but grieve for the defenceless animals thought to have died so far, pushing certain species closer to extinction. I’m lucky enough to visit Australia often and I know first-hand how beautiful the country is.

“Keep fighting Australia. I’ve spent some time speaking to people in Australia who are working at the heart of this and I’m filled with admiration for everything they are doing.”

Athletes donate for bushfire appeal

Australians have just been given more than a million reasons to love Shane Warne.

The beloved Aussie cricket great's baggy green cap has officially sold at auction - raking in more than one million dollars for the bushfire crisis engulfing Australia.

Interest in Warne's treasured piece of cricket memorabilia has been going through the roof ever since he announced he would put it up for sale to raise money for the bushfire relief.

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By 8am on Thursday morning (AEDT), the top bid on Warne's baggy green cap was a whopping $511,000.

However, 24 hours later that astronomical figure had risen by more than $400,000.

Late bids saw the auction top the $1 million mark before the baggy green finally sold for an eye-watering $1,007,500 at 10am on Friday morning (AEDT), smashing the $425,000 that Sir Don Bradman’s baggy green once sold for.

Lewis Hamilton looking forward in Mercedes gear.
Lewis Hamilton has donated $500,000 to the Australian bushfire appeal. (Getty Images)