It's something pop music fans look forward to all year...DJ Earworm has released his annual mashup of the year's biggest songs all in one super catchy track.

This year's version is called '50 Shades of Pop' and includes hits from Taylor Swift, Maroon 5, Justin Bieber, The Weeknd, Jason DeRulo, Bruno Mars, Ed Sheeran, Selena Gomez, Fifth Harmony, and a ton more. (Yes, Adele's 'Hello' made the cut too!)

It's such a cool way to look back at the year in pop music.

The guy is just super talented.

What was your favorite song of 2015?