As the late-night shakedown gets messier, Jay Leno and Conan O’Brien seem to be turning against each other—and David Letterman is clearly on Team Conan. The Late Show host wants O’Brien to appear on his show “not to rub NBC's noses into their huge mistake, but to welcome Conan with open arms and show him that despite the way his old network has treated him, America loves him,” a source tells PopEater. More: