Before participating in his second Reddit.com AMA, Microsoft founder and philanthropist Bill Gates appeared in a whimsical web video alongside Snoo, Reddit's mascot. In an echo of the openness and low-key aesthetic of Reddit, this odd couple spends the day together, bonding over a game of chess, yoga, and some "light reading." To score this unlikely encounter, the Gates Foundation asked us to clear the rights to an appropriately light-hearted track: "Best Friend." This tune, composed by Harry Nilsson and famously used as the theme song for '60s sitcom The Courtship of Eddie's Father, gave the spot a pleasantly bouncy feel