Iggy Azalea's huge chart-topper Fancy has been named the Song of the Summer by Billboard magazine.

The track, which features vocals by Charli Xcx, topped America's Billboard Hot 100 chart seven consecutive weeks over the summer (14), and it has now topped the magazine's list of most popular tracks.

Azalea scored a double in the countdown as Problem, her collaboration with Ariana Grande, took third place behind Rude by Magic! at two.

Last year's (13) Song of the Summer was Blurred Lines by Robin Thicke.