Paramore takes over the #1 spot with Ain't It Fun, and we welcome Pitbull with G.R.L. to the countdown.

#8. She Looks So Perfect-5 Seconds Of Summer

#7. #Selfie-The Chainsmokers

#6. Wild Wild Love-Pitbull w/ G.R.L.

#5. La La La-Naughty Boy

#4. Fancy-Iggy Azalea

#3. Not A Bad Thing-Justin Timberlake

#2. Classic-MKTO

#1. Ain't It Fun-Paramore