I might as well go first: Emilia - Big Big World

I absolutely hated it when it was released and played everywhere, and I recently accidentally stumbled across it, and to the surprise of nobody, I still loathe it.

• Melody of a lullaby.
• Least interesting chord progression in existence.
• Lyrics as if they were written by a 12 year old.
• Annoying motifs.

Honorable mention: How you remind me. I'm not just bandwagoning on nicklelback hate here, I actually kinda like them, at least their first album. But that song is so overplayed and overrated I simply cannot stand it.