At the Oscars on Sunday (8 pm/ET, ABC), only three tunes will compete for the Best Song statuette: "Down to Earth" by Peter Gabriel from WALL-E and two songs from Slumdog Millionaire, none of which you had ever heard before they were nominated. How the songs are chosen is notoriously complicated, and the results are always a little suspect. While there have been some legitimate musical masterpieces that have won (Hello, "Moon River"!), it's usually much more random (That Phil Collins dreck from the Tarzan movie over Aimee Mann and South Park? Seriously?). Here's our extremely subjective take on the match-ups through the years — who deserved to win, who pulled a fast one on the Academy and which annoying little ditties will be stuck in your head for hours to come. Take a gander at our lists of the most memorable Best Song winners and nominees — and a few that we think should have been nominated — and then tell us which movie songs are your favorites.