Sheryl Crow's rider demands for her "Stop Global Warming College Tour" reportedly included four buses, six cars and three tractor trailers for her entourage.
The singer - who traveled on a bio-diesel bus for two weeks during the tour - is said to have made the environmentally unfriendly request to ensure her staff traveled in comfort.
Sheryl's pollution-heavy request comes in the wake of her urging young people to reduce their carbon footprint.
She said: "As we've been telling them, it's not about doing everything, it's about doing something. We want to bring people over to the side of protecting the environment and give kids some idea of how they can be a part of that movement."
Sheryl also reportedly requires a variety of alcoholic beverages, depending on what day of the week her shows fall on.
If she performs on a Tuesday, Sheryl requires gin, on Thursdays she wants champagne, while on Fridays she demands tequila.
The 45-year-old also asks for 12 bottles of Grolsch beer, six bottles of 'local' beer, along with "good Australian Cabernet" and "good Merlot" wine.
A representative for the "If It Makes You Happy" singer said: "That rider was an old one. It was from ten years ago."
The representative declined to show a current rider for Sheryl.