2014

Pharrell's 'Happy' soundtracked the year with relentless optimism, while John Legend's 'All of Me' became the decade's wedding anthem. Meghan Trainor and Iggy Azalea debuted as chart forces, Frozen's 'Let It Go' crossed from soundtrack to pop phenomenon, and Sam Smith's soulful 'Stay With Me' heralded a new British invasion of emotive vocalists.