What did you just have to know in 2012? Whatever it was, chances are pretty good that you googled it.
Google keeps track of everything everyone googles, and every year around this time, they come out with a list. They call it "Zeitgeist" -- the top searches, the hottest trends around the world in the year that's about to end.
Google says "Whitney Houston" was the most searched-for term worldwide in 2012, topping South Korean pop star "Psy" and his ultra-viral video, "Gangnam Style." Watch for more.