mtvU continued its surprise "Stand In" event series by hosting actress Cameron Diaz at Stanford University. Diaz and world-renowned architect and designer William McDonough surprised Stanford's "Maintaining Sustainable Building Projects" class where she greeted the fifty unsuspecting students in the Civil and Environmental Engineering program as their "Stand In" professor. In addition to discussing the sustainable development movement and civil engineering techniques being used to help protect the environment, Diaz also told students of her own experiences traveling to some of the most ecologically unique locales in her MTV series "Trippin."

• Watch the Cameron Diaz Stand In

Past Stand In Features Read about past Stand Ins by selecting an artist name from the drop-down.

Select An Artist -------- Marian Wright Edelman Dr. Muhammad Yunus President Ellen Johnson-Sirleaf Don Cheadle Annie Lennox President Paul Kagame Sam Brownback Malcolm Gladwell & Kenna Mike Judge Jhumpa Lahiri Larry David George Clinton Natalie Portman Madonna Cameron Diaz cameron_diaz == cameron_diaz, so currentIndex is:14 Bill Gates Melissa Etheridge Shimon Peres John McCain Sting Ashley Judd Elie Wiesel Kareem Abdul-Jabbar Tom Wolfe Russell Simmons Nas & Olu Dara Marilyn Manson Snoop Dogg Jesse Jackson Frank McCourt