2007: #1 - "Say It Right"

In the ambiguous, mysterious and irresistibly catchy "Say It Right", Nelly Furtado sneaks up on you, whispers into your ear, asks you to stay, then vanishes into the night without warning. When we first heard this, we were caught off guard and bowled over, but it still has the same hauntingly memorable quality to it, nearly three years later; perhaps only "Poker Face" and one other song this decade can boast its mix of superior melody and playful mystery.