Formerly SF-based DJ and recent LA transplant DJ Earworm has just dropped his hotly anticipated, traditional annual tribute mashup to the year in pop, and it's a good one. As usual he uses Billboard's Top 25 songs of the year, mashes them all into one gigantic, complex medley, and mashes up their videos too. Like last year's mix, this one is ballad heavy, and like the mashups for several years, Katy Perry figures prominently. You can see the full array of tracks below.

Download the full version, and mashups from previous years, here. (It's not live there yet, but should be shortly.)

A Great Big World feat. Christina Aguilera - Say Something
Ariana Grande feat. 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 feat. Charli XCX - Fancy
Iggy Azalea feat. Rita Ora - Black Widow
Jason Derulo feat. 2 Chainz - Talk Dirty
Jeremih feat. YG - Don't Tell 'Em
Jessie J feat. Ariana Grande & Nicki Minaj - Bang Bang
John Legend - All Of Me
Katy Perry feat. Juicy J - Dark Horse
Lorde - Team
Magic! - Rude
Maroon 5 - Animals
Meghan Trainor - All About That Bass
Nico & Vinz - Am I Wrong
One Direction - Story of My Life
Passenger - Let Her Go
Pharrell Williams - Happy
Pitbull feat. Ke$ha - Timber
Sam Smith - stay with me
Taylor Swift - Shake It Off
Tove Lo - Habits