Top 5 Green celebs: Hayden Panettiere
4. Hayden Panettiere
She may drive a gas-guzzler, but Hayden put herself in harm's way to save dolphins in Japan -- and, more importantly, she hasn't posed naked for PETA (yet). Amidst a young Hollywood culture that rewards crazy drunken antics more than anything else, it's refreshing to see an actress who's earnestly working to make a difference.















