Taylor Swift, Katy Perry, Sam Smith & More Feature in End of Year Mashup Song

The greatest end-of-year-round-up of them all has landed: DJ Earworm has unveiled his "United State of Pop 2014," mash-up entitled "Do What You Wanna Do," combining 25 of the year's most popular hits. And you best bet the gang's all here with our October cover girl Ariana Grande, Taylor Swift, Iggy Azalea, Pharrell, Sam Smith, Katy Perry, and Meghan Trainor among other chart-toppers. The producer, who began creating his signature mash-ups in 2007 says this is the "most blended instrumental I've been able to achieve yet." Sit, back, relax, and relive the year in music in the 4-minute amalgamation. View the entire tracklist, below:

A Great Big World featuring Christina Aguilera, "Say Something"

Ariana Grande featuring Iggy Azalea, "Problem"

Bastille, "Pompeii"

Dj Snake & Lil Jon, "Turn Down For What"

Hozier, "Take Me to Church"

Idina Menzel, "Let It Go"

Iggy Azalea featuring Charli XCX, "Fancy"

Iggy Azalea featuring Rita Ora, "Black Widow"

Jason Derulo featuring 2 Chainz, "Talk Dirty"

Jeremih featuring YG, "Don't Tell 'Em"

Jessie J featuring Ariana Grande & Nicki Minaj, "Bang Bang"

John Legend, "All of Me"

Katy Perry featuring Juicy J, "Dark Horse"

Lorde, "Team"

Magic!, "Rude"

Maroon 5, "Animals"

Meghan Trainor, "All About That Bass"

Nico and Vinz, "Am I Wrong"

One Direction, "Story of My Life"

Passenger, "Let Her Go"

Pharrell Williams, "Happy"

Pitbull featuring Ke$ha, "Timber"

Sam Smith, "Stay With Me"

Taylor Swift, "Shake It Off"

Tove Lo, "Habits"