May 2015 –
1. Carly Rae Jepsen – I Really Like You
2. Mark Ronson ft. Bruno Mars – Uptown Funk
3. Meghan Trainor – Dear Future Husband
4. Rihanna & Kanye West & Paul McCartney – Four Five Seconds
5. Sia – Chandelier
6. Taylor Swift – Blank Space
7. Sam Smith – I’m Not The Only One
8. Maroon 5 – Sugar