Are you excited for the Paul McCartney-Ringo Starr special tonight on CBS? I know I am. Paul and Ringo will be “reuniting” as the Beatles to honor the 50th anniversary of their first Ed Sullivan appearance, and a number of contemporary artists (Alicia Keys, Gary Clark, Jr., the Eurythmics) will be paying tribute. If you’re still not psyched about it, here’s a clip that may entice you: Broken Bells playing “And I Love Her” (feat. Ringo Starr) on Letterman last week, in the same theater that once housed The Ed Sullivan Show…