List of most viewed YouTube videos

             Videos with highest views in Youtube

                                                       Here's the list of top 10 videos acquiring most views in Youtube. Till today PSY's "Gangnam Style" has the most views with more than 2.75 billions. 

                                                      These videos include the "Billion View Club", a group of videos whose view counts have exceeded one billion (10⁹) views each. Prior to June 28, 2015, only two videos, "Gangnam Style" and "Baby", had reached this milestone, but less than 3½ months later, on October 7, 2015, ten videos had done so.  
                                                        As of February 2017, a total of 47 videos have exceeded one billion views, four of which have exceeded two billion views. The five fastest videos to reach one billion views are "Hello", in 87 days, "Sorry" (137 days), "Gangnam Style" (159 days), "Closer (Lyric video)" (165 days), and "This Is What You Came For" (166 days).
                                                      As of February 2017, Justin Bieber is the only artist to have four videos exceeding 1 billion views, while Taylor Swift has three, with two of hers being in the top 10. Katy Perry, Fifth Harmony, Psy, Adele, Ellie Goulding, and Calvin Harris
 each have two videos that exceed 1 billion views.

                                         And also here's the historical most viewed videos. ( Also conatins deleted videos may not be  available  today).

                                                                                                                                                  source:wikipedia