Every year deserves its own signature whistling hook. Last year it was Foster the People. This year it's the tattooed sunshine stater who moved countless bodies and raised a few eyebrows with this Top 40 earworm. Whether the concept is truly a tutorial on how to carry a tune by putting your lips together or a metaphorical nod to another kind of oral pleasure, that sweet little melody gave beachfront lotharios an infectious new catcall to use throughout the summer.