Sia owned last year with "Chandelier," and there's a distinct chance she'll be running our summer fiestas with her new jam "Deja Vu," a collaborator with disco master (and three-time Academy Award winner) Giorgio Moroder.

It has all the hallmarks of a song of the summer: catchiness, carefreeness, a great vocal, and ebullience. So far it's a worthier candidate than Britney Spears' squawky "Pretty Girls" with Iggy Azalea, though I'm pretty sure that'll get remixed into something better in the coming months. Bonus: If you didn't hear Giorgio Moroder's recent collaboration with Kylie Minogue, "Right Here, Right Now," treat yourself. I'm still on the fence about his Britney-tinged remake of "Tom's Diner."