Toyota Prius hybrids instead of gas-guzzling limousines.
The celebrities want to demonstrate how each citizen can take a simple yet powerful step to decrease dependence on fossil fuels, reduce air pollution and stem global warming, according to a statement by the Global Green USA Campaign.
"With global warming threatening us all, driving a fuel efficient car like a hybrid is something that everybody can do to protect our planet," said actor Salma Hayek, who will be a presenter at this year's awards ceremony Sunday. "I am proud to do my part: I personally own and drive a hybrid car -- and I love it!"
Notable deaths of 2014 [PHOTOS]
Reports: Mila Kunis gives birth to baby girl