So here we are pitting the singles off 2 very successful recently released albums from 2 young pop girls. I haven't included "Bang Bang" for Ariana since it was more Jessie J's single than anyone's, plus that gives us 4 singles a piece. I will bold my choices
Problem vs Good for You Break Free vs Same Old Love
Love Me Harder vs Hands to Myself
One Last Time vs Kill Em with Kindness