10 POINTS TO FIRST ANSWER(S)!pop song name i need help finding?

well i was listening to this new song and its a girls voice and i THINK it said na na na na na na na na na na whistle whistle whistle wistle and its pop techno kind i guess and i think i heard it in a commercial at this point i love the song and im sooo upset cuz i dont no wht it is!!?! so plz plz help me remember !10 points to first answers thanks sooo much luck and love , val:)