16 of the biggest Songs of 2014 All Of Me (Legend, John) Am I Wrong (Nico & Vinz) Best Day Of My Life (American Authors) Dark Horse (Perry, Katy) Fancy (Azalea, Iggy) (Charli XCX) Happy (from Despicable Me) (Williams, Pharrell) Let It Go (from Disney's Animated Feature Frozen) (Menzel, Idina) Love Never Felt So Good (Jackson, Michael) (Timberlake, Justin) Love Someone (Mraz, Jason) Pompeii (Bastille) Problem (Grande, Ariana) (Azalea, Iggy) Raging Fire (Phillips, Philip) Sing (Sheeran, Ed) Stay With Me (Smith, Sam) Summer (Harris, Calvin) Timber (Pitbull) (Kesha)