There are so few examples of perfection in the world these days. But I feel fairly comfortable saying, after watching it approximately four dozen times, that this clip of Tom Holland performing a medley of "Singing in the Rain" and Rihanna's "Umbrella," is a perfect two minutes and 24 seconds of cinema. https://www.youtube.com/watch?v=jPCJIB1f7jk If you've never seen it before, I envy you. If you haven't seen it in the last few days/weeks/months/years, don't worry. It holds up to your memory. Every beat remains a beautiful surprise: Holland'…