Grande returns to No. 1 for the first time in over a year, while Bieber loses the top spot after a 56-week run (159 in all) at the top spot.
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The Social 50 is powered by data tracked by music analytics company Next Big Sound and ranks the most popular artists on Facebook, Twitter, Instagram, YouTube, SoundCloud, Wikipedia, Instagram, Tumblr and Vine. The chart's methodology blends weekly additions of friends/fans/followers along with artist page views and engagement.