Demi Lovato and Little Mix chosen in Billboard's Song of the Summer review

The staff at music magazine Billboard have chosen the songs that defined their summer months and two of the most popular tracks were Little Mix's 'Black Magic' and Demi Lovato's 'Cool For The Summer'.

Writer Erin Strecker picked Little Mix's recent single and explained that it makes her want to dance every time she hears it:

"I will always remember summer 2015 as the time I became a Little Mix fan, for which I give full credit to their hit 'Black Magic,' my personal song of summer. Anybody else want to have a spontaneous dance party? Because I do. Every time I listen to them."

Photo editor Trish Halpin named Lovato's anthem as her pick and added: "Is it cliché for my song of the summer to have the word 'summer' in the title? Whatever, I don't care. Since I spent this summer getting in touch with my inner #teen, when Demi dropped this perfect pop bomb, I was all over it. At the beach, in the car, in the shower, I played this song everywhere because it's a f**king masterpiece."

Watch the music video for 'Cool For The Summer' here: