"Got to Give It Up" (Pt. 1 & 2), Marvin Gaye
Soul music's tortured prince goes disco by figuring out how to make heavy funk light on its feet. It is impossible not to move to this 1977 jam, especially because it is about a shy dude afraid of the world until he hits the dancefloor. Perfect for any backyard cookout, it obviously changed Michael Jackson's life.