Covered Up: Not exactly, but Dinosaur Jr.'s version of "Just Like Heaven" is well known and well liked. Robert Smith says it's his favorite cover of any of his songs, and that it's influenced the way it's played live.
Crowning Music of Awesome: Lots and lots of songs qualify: "Almost Ready", "Just Like Heaven", "Freak Scene", etc.
Ear Worm: "Just Like Heaven", "Freak Scene", "Almost Ready", "Keep the Glove" and "Cats in a Bowl".