Justin Bieber is the King of Pop! Just last month, fans listened to songs from his latest album Justice on Spotify, more than 500 million times.
The Bieb also sold more than 336,000 copies of the album in the U.S., the fourth most of anybody. Plus, he garnered over 179-million views on YouTube, which put him in the top 20.
But perhaps the biggest sign that he's the biggest pop star right now is on Instagram. Bieber was the most popular musician on the photo sharing app in April, putting him in the top position there for 5 of the last 6 months.
That kind of dominance may help explain why he is the top pop star on Bloomberg's Power Rankings for the second month in a row.