I usually don't assign rankings to these since it can often prelude to the year-end. But I truly think this list will shuffle up a lot (i.e. Katy Perry, Arcade Fire, Broken Social Scene, adding Eminem, Muse, Brandon Flowers, etc.)
30. Cage The Elephant - In One Ear
29. Mumford & Sons - The Cave
28. Broken Social Scene - Forced To Love
27. Drake - Over
26. Broken Bells - The High Road
25. Usher feat. Will I Am - OMG
24. The Arcade Fire - Ready To Start
23. Kesha - Your Love Is My Drug
22. B.o.B. feat. Hayley Williams - Airplanes
21. MIA feat. Jay Z - XXXO (Remix)
20. Crash Kings - Mountain Man
19. Arkells - John Lennon
18. Katy Perry feat. Snoop Dogg - California Girls
17. Lady Antebellum - Need You Now
16. Drake - Find Your Love
15. Taio Cruz - Break Your Heart
14. Vampire Weekend - Cousins
13. Metric - Gold Gun Girls
12. B.o.B. feat. Bruno Mars - Nothin' On You
11. Rihanna - Rude Boy
10. The Temper Trap - Sweet Disposition
9. Spoon - Written In Reverse
8. Mumford & Sons - Little Lion Man
7. John Mayer - Heartbreak Warfare / Half Of My Heart
6. Vampire Weekend - Giving Up The Gun
5. Gorillaz - Superfast Jellyfish / Rhinestone Eyes
4. Tiesto feat. Tegan & Sara - Feel It In My Bones
3. Silversun Pickups - The Royal We / Substitution
2. Lady GaGa feat. Beyonce - Telephone 1. Phoenix - Lisztomania
29/30
Haven't heard 19
Great music you got here in this Mid-year c/d
Sweet Disposition,Superfast Jellyfish / Rhinestone Eyes,The Royal We ,Mountain Man,Forced To Love
I like to Lisztomania the #1 all day
Great c/d