There are a variety of different shows each night of your sail. It won't be possible to see them all — trust me, there's so much to do on board! — so it's best to plan out your week as early as possible. My two favorites, Love and Marriage and Lip Sync Battle on Carnival Vista, were only shown once the entire time, whereas the same comedians will perform a different bit each night.
Image Source: POPSUGAR Photography / Nicole Yi