The musical mash-up maestro, DJ Earworm, has just released this year’s impressive mix and it’s a perfect summary of 2014 – Do What You Wanna Do! For the past 7 years the California producer has treated us to this annual mash up of the year’s 25 biggest hits. This year, the mood is more contemplative, paying respect to the ebb and flow of popular music.

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This years United State of Pop is probably the best one yet, even if you are not usually into mash ups you’re bound to enjoy this one. Expertly edited, it has clips of Taylor Swift, Katy Perry, Maroon 5, Meghan Trainor, Iggy Azalea and more – it even has a sample of Let it Go from Frozen.

In an interview with Billboard Magazine Earworm said: “The thing that has been most notable in the past two or three years is the decline of EDM. The ‘United State of Pop’ became this dance track from ’09 to ’12, and then starting last year, there just wasn’t enough in that genre to fully support it, so I went down-tempo. And this year, Timber, which was popular in January, is the only popular dance track I’m dealing with. It’s definitely down-tempo, so you have to decide, how is this going to go? How am I going to maintain the energy levels while being true to the sound of the year?”

“2014 was dominated by these slow, ponderous songs like Say Something and All Of Me, and then swaggering hip-hop songs like Turn Down For What, Talk Dirty, and Black Widow. Then you have totally uptempo songs like Happy and Shake It Off, too. It’s a little bit more diverse, and definitely softer than it’s been.”

Earworm (real name, Jordan Roseman) has been obsessed with the Billboard charts since he was 11 years old: “When I was a little boy, I used to tune in to Top 40 shows on the weekends, and I’ve always been fascinated by what makes popular tastes tick … It’s great to be able to come full-circle with Billboard.”