Not pop music, but just my top 10 songs in general from 2012:

10. Greeen Linez - Frisk

9. Grimes - Genesis

8. The Shins - Simple Song

7. Sleigh Bells - Born to Lose

6. Saint Etienne - Tonight

5. Django Django - Default

4. Fiona Apple - Werewolf

3. Cat Power - Ruin

2. Passion Pit - It's Not My Fault, I'm Happy

1. Japandroids - The House That Heaven Built