You may remember the amazing video of two girls that called themselves Lulu and the Lampshades, which went viral back in 2009. Well, if imitation really is the sincerest form of flattery then these two should be quite honored. Their video has been re-done thousands of times on YouTube, and now, it has reached it's climax- it made Late Night Television. The adorable Anna Kendrick apparently learned the song and cup routine on Reddit, and preforms it in her new movie, Pitch Perfect. But when Letterman asked her to spontaneously bust out the trick live on-air, she more than rose to the occasion, wowing both Letterman and the audience.