City Car Club, a carshare operator established in 2000 and based in the U.K. operates a fleet of vehicles including many Honda Civic Hybrids. The carshare group recently polled celebrities to find out what kind of vehicles they drive. Afterwards, the average CO₂ emissions of their fleets were summed up and the celebs were ranked. The worst of the worst turns out to be Simon Cowell, the judge you know and love from American Idol. Apparently, the Bugatti Veyron, Ferrari F430 and Rolls Royce Phantom in his garage average 457 g/km of CO₂, with the Veyron emitting the most at a whopping 574 g/km.

Jay Kay, "that bloke what wears daft stuff on his head" and frontman for the funk band Jamiroquai comes in at second place, followed by soccer star David Bekham. We're not really sure just how exhaustive the City Car Club's list is, but check out the top bottom ten after the break. American celebs appearing on the list include rapper fiddy 50 Cent and singer Justin Timberlake.

Click the photo for a high-res gallery of the 2008 Indy pace cars

On Memorial Day weekend in 2008, General Motors is taking their ethanol promotional campaign to the Indianapolis Motor Speedway. For the tenth time, a Chevrolet Corvette will be leading the racers around the track for the Indy 500. This time around, however, the 'Vette won't have only gasoline in the tank. Instead, the bright green car will be running on E85. The ethanol-fueled Corvette Z06 pace car will be driven on race day by two-time World Champion and two-time Indy 500 champ Emerson Fittipaldi. In addition to the E85 Corvette, Chevrolet will be providing a special black and silver Corvette commemorating the 30th anniversary of the first pace car 'Vette. Chevy will build 500 replicas of the anniversary pace car for sale in both coupe and convertible forms.

[Source: Chevrolet]