This is the BEST mash-up of this year's most popular songs worldwide, aptly titled 'United State Of Pop'.
Check Out if you can pick out all these songs:
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"