Billboard’s Greatest Pop Stars of the 21st Century: No. 13 — Nicki Minaj
With the first quarter of the 21st century coming to a close, Billboard is spending the next few months counting down our staff picks for the 25 greatest pop stars of the last 25 years. We’ve already named our Honorable Mentions and our No. 25, No. 24, No. 23, No. 22, No. 21, No. 20, No. 19, No. 18, No. 17, No. 16, No. 15 and No. 14 stars,…