Tonight we have Anderson Cooper's appearance on The Tonight Show with Jay Leno that aired on March 27, 2008.
And here's AC's appearance, in 2 parts, from May 6, 2009.
Sadly we have no copy of Anderson appearing on The Tonight Show in August 2007. If anyone has it we'd love a copy. You can read about it here. Cooper's story about prematurely going grey and Heidi Klum's reaction were priceless.