DJ Earworm's 'United State Of Pop' For 2014 Mashes Up The Year's Most Popular Songs : br A mashup of the 25 biggest hits during 2014 in the U.S. br br Featuring: br br A Great Big World feat. Christina Aguilera - Say Something br Ariana Grande feat. Iggy Azalea - Problem br Bastille - Pompeii br Dj Snake & Lil Jon - Turn Down For What br Hozier - Take Me to Church br Idina Menzel - Let It Go br Iggy Azalea feat. Charli XCX - Fancy br Iggy Azalea feat. Rita Ora - Black Widow br Jason Derulo feat. 2 Chainz - Talk Dirty br Jeremih feat. YG - Don't Tell 'Em br Jessie J feat. Ariana Grande & Nicki Minaj - Bang Bang br John Legend - All Of Me br Katy Perry feat. Juicy J - Dark Horse br Lorde - Team br Magic! - Rude br Maroon 5 - Animals br Meghan Trainor - All About That Bass br Nico & Vinz - Am I Wrong br One Direction - Story of My Life br Passenger - Let Her Go br Pharrell Williams - Happy br Pitbull feat. Ke$ha - Timber br Sam Smith - stay with me br Taylor Swift - Shake It Off br Tove Lo - Habits br br br br The most popular songs in the U.S.