![Robert Downey Jr. Goes Viral For Ice Bucket Challenge [VIDEO]](http://townsquare.media/site/10/files/2014/08/hqdefault26.jpg?w=980&q=75)
Robert Downey Jr. Goes Viral For Ice Bucket Challenge [VIDEO]
Robert Downey Jr. may have the fastest YouTube rise during the ASL Challenge surge but, who has been your favorite video to partake in the Ice Bucket Challenge?
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Robert Downey Jr. may have the fastest YouTube rise during the ASL Challenge surge but, who has been your favorite video to partake in the Ice Bucket Challenge?