Iggy Azalea is just slaying this week. Her #1 hit Fancy drops off the pole position, but her collaboration, Problem, with Ariana Grande debuts at #1, giving Ariana her first ever #1. This is the third time an artist held the top 2 spot since 2011 when Lady Gaga topped with The Edge of Glory, with Judas trailing behind for a week. The first was in 2010 when Rihanna held it with What's My Name? and Only Girl (In the World).
Ariana Grande on the other hand, has only been to #2 with The Way.