1. John Legend wrote "American Boy"

2. Pharrell Williams wrote "Hot In Herre"


3. Bebe Rexha wrote "Monster"


4. Sia wrote "Diamonds"

5. Jessie J wrote "Party In The USA"


6. Katy Perry wrote "I Do Not Hook Up"


7. Bruno Mars wrote "Forget You"

8. Kesha wrote "Till The World Ends"

9. Ne-Yo wrote "Irreplaceable"

10. P!nk wrote "Whataya Want From Me"


11. Avril Lavigne wrote "Breakaway"


12. Christina Milian wrote "Baby"


13. Prince wrote "Nothing Compares 2U"


14. Jay-Z wrote Bugs Bunny's rap, "Buggin'" from Space Jam


15. Pharrell Williams wrote "Milkshake"


16. Ed Sheeran wrote "Strip That Down"

