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Many of the top social platforms have been creating end of year lists of what have been the biggest trends on their sites. We discuss what was popular on Twitter and Facebook. We also speak to Kevin Allocca, who has been involved with making this year’s YouTube Rewind video – featuring some of the biggest videos of the year.

(Image:Chas McKhann has ice water poured on himself during the Walla Walla Grand Ice Bucket Challenge in Walla Walla. Credit: AP Photo/Walla Walla Union-Bulletin, Greg Lehman, File)