This is What Trended This Year: Do you remember that unavoidable song from last year? It was “Hello,” by British singer Adele. People loved Adele and her song. So when she appeared on comedian James Corden’s late-night television show, lots of people watched. And many who did not watch the show that night watched her appearance later on YouTube. Their viewing made Adele’s turn on Corden’s popular “Carpool Karaoke” segment the most popular YouTube video of 2016. The video of Adele riding in the car with Corden and singing her hit songs was played almost 140 million times in 2016. The most popular Twitter topics of the year were: the Olympic Games in Rio de Janeiro, the U.S. Election, PokemonGo, the Euro 2016 soccer tournament, the Oscars and Brexit.