In honor of Earth Day on Wednesday, environmental Web site GreenDaily.com has named singer Mariah Carey the “least green celebrity.” What did Carey do to deserve the dis? She was quoted as saying that she flies her personal trainer from St. Barts in the Caribbean to New York to keep her on a workout regimen.

The AOL-owned GreenDaily.com created the “least green” celebrity list in cooperation with social networking site Bebo.com, based on an online poll.

A spokeswoman for Carey was not available.

While Carey was voted least green by 35 percent of respondents, another 27 percent said actor John Travolta was Hollywood’s worst environmental offender for his use of private jets, which GreenDaily.com said are responsible for 800 tons of carbon emissions per year.

Who is Hollywood’s greenest celebrity? Thirty-six percent of the poll’s respondents said actor and longtime environmental activist Leonardo DiCaprio. He topped the list, followed by U2 frontman Bono and actor Ed Begley Jr., the former “St. Elsewhere” star who has been known to sell his own green cleaning spray at the farmers market on weekends.

It’s a green world out there, at least on Earth Day. And with Web sites like GreenDaily.com trolling through Hollywood, woe to the stars who live it up and forget about their carbon footprint.