If it seems like David Guetta ruled the world of electronic pop music in 2015, that's because he did. Last week, Billboard revealed its year-end charts, and the "Hey Mama" DJ topped the charts for EDM and dance music.

According to Billboard, the most successful EDM artist of the year was determined by three factors: radio airplay, sales data and streaming data.

With all three factors Billboard took into determining their rankings, Guetta came out as the No. 1 dance/electronic artist of 2015. He ruled over some of the year's other big names, including Calvin Harris, DJ Snake, Avicii and Disclosure.

Guetta did have a great 2015, releasing "Hey Mama" featuring Nicki Minaj, Bebe Rexha and Afrojack, which has over 500 million views on YouTube, One of his hit tracks, "Bang My Head," featuring Sia, from his 2014 album, Listen, received a very unexpected remix with Fetty Wap joining in on the track just a few months ago.

As if that weren't enough, Forbes revealed it's highest paid DJs of 2015, with Guetta coming in second, next to Calvin Harris, with a cool $37 Million in 2015 alone.

Some other notable names to make Billboard's list were Zedd (No. 5), Skrillex (No. 6), Diplo (No. 7), Major Lazer (No. 4), Avicii (No. 10), ALUNAGEORGE (No. 12), Disclosure (No. 15), Alesso (No. 16), Deadmau5 (No. 24), Kygo (No. 25), Afrojack (No. 32), Kaskade (No. 33), Dillon Francis (No. 36) and Martin Garrix (No. 39) - just to name a few.

There were also a few surprising names on the list such as Madona, Clean Bandit, Lady Gaga and Ellie Goulding, none of whom were listed on DJ Mag's Top 100 list for 2015.

Billboard has certainly proven that there are other ways to measure success other than just fan votes, which has been revealed in the stark contrasts in the ranking systems between their list and DJ Mag's, for EDM in 2015. It's tough to determine which list is "right," but at least fans now have an alternative to DJ Mag, which, as stated earlier, has been the pedestal and benchmark for many years.

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