By Annie Barrett
Updated June 01, 2009 at 10:30 PM EDT

Uh oh! Conan or Letterman tonight? In the immortal words of Lucille Bluth, “I don’t understand the question, and I won’t respond to it.” It was always easy to choose between the very different Letterman and Leno — not so much with tonight’s face-off of “Letterman vs. Mini-Letterman” (at least that’s how New York mag put it in a feature posted yesterday). Anyway, there’s no need to decide just yet. All eyes will be on Conan’s ginger mop — which does not move even slightly, even as he sprints on a beach — this week. And Conan’s sidekick for seven years, Andy Richter, is back, joining O’Brien for the first time on a daily basis since 2000. For a pastry-centric glimpse of their unparalleled on-screen chemistry, look no further than Conan’s guest appearance on Andy Richter Controls the Universe:

Who’s ready for Conan’s first Tonight Show? And if you’re a regular Letterman-monger, will you bother to watch both?