Pontiac Aztek GT
The Pontiac Aztek was a mid-size crossover, the first offered by General Motors, that was produced by Pontiac from the 2001 model year to the 2005 model year. The Aztek was heavily criticized on its exterior styling, with Time magazine in 2007 calling the Aztek one of the worst cars of all time, and again in 2010 as the 34th worst invention of all time. A poll in The Daily Telegraph in August 2008 placed the Aztek at number one of the "100 ugliest cars" of all time.
Source: Wikipedia, 2011