Google's Thursday-released Zeitgeist 2011 - the company's year-end retrospective which discloses the `hottest queries of the year' - has revealed that the fastest-rising search term round the globe on Google in the year 2011 was' Rebecca Black', whose song "Friday" was a YouTube hit.

To emerge right at the top of the annual Zeitgeist ranking of terms that witnessed the maximum growth, Black outshined Google new social networking service, Google+, which was the second fastest-rising term in Zeitgeist 2011 ranking.