Billboard names Beyoncé the greatest pop star of the 21st century

Beyoncé has been named the greatest pop star of the 21st century by Billboard, the music charting site announced on Tuesday as part of an ongoing series.

​ Beyoncé has been named the greatest pop star of the 21st century by Billboard, the music charting site announced on Tuesday as part of an ongoing series. Read More Breaking News, Latest News and Videos | CNN