The Chainsmokers are dropping fast as Iggy Azalea climbs to #5 with Fancy. And Justin Timberlake bounces back into the top 3. Here's how it went down. 

#8. Move-Little Mix

#7. #Selfie-The Chainsmokers

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

#5. Fancy-Iggy Azalea

#4.  La La La-Naughty Boy

#3. Not A Bad Thing-Justin Timberlake

#2. Ain't It Fun-Paramore

#1. Classic-MKTO