The New York Times, Green Inc.
May 22, 2009, Leora Broiydo Vestel

Cameron Diaz, an actress who is also known for her eco-friendly lifestyle, had bloggers buzzing after an appearance earlier this week on the Tonight Show, where she described her water-conscious toilet-flushing mantra to host Jay Leno. “If it’s yellow leave it mellow, if it’s brown flush it down,” Ms. Diaz said. “I believe in that 100 percent.”...

http://greeninc.blogs.nytimes.com/2009/05/22/hippies-hollywood-and-the-flush-factor/