Katy Perry closes out an extraordinary 2014 as radio’s Artist of the Year. According to Mediabase, she is the only artist with the most spins at three different radio formats. In addition to being the most-played act at Top 40, Hot AC and AC radio, Katy’s single “Dark Horse” (feat. Juicy J) — from her quadruple Platinum album PRISM (Capitol Records) — was the most-played song of 2014 at Top 40 radio. The track, which has been certified eight-times Platinum, is her ninth single to top the Billboard Hot 100. Katy is the only artist to have scored a No. 1 Hot 100 single in each year of the current decade.