This is one of my all-time favorite goofy Star Trek moments. The Doctor teaches Seven of Nine about music, and they end up doing a duet of "You are my Sunshine." One of the things I love about Star Trek is that no matter how odd or offbeat the situation, it's just another day on the starship (or space station) as far as the characters are concerned. And only on Star Trek would you have a hologram teach a cyborg about music. Enjoy!