For Conan, it's Will Ferrell. Leno has Oprah and Seinfeld. Julia Roberts and Drew Barrymore favor Letterman.
In the often high-stakes ratings game of late night television, the hosts have learned: It helps to have a few loyal guests to call your own.
When Conan O'Brien made the move to Los Angeles to become the host of "The Tonight Show" last week, he called on his good friend and ally Will Ferrell, who was also his last guest on the final "Late Night with Conan O'Brien" show in New York last...Full Story