You won't be able to write the words to Carly Rae Jepsen's upcoming single "Take A Picture," but American Idol and Coca-Cola are hoping that voting for nearly every line of the song will be enough to engage fans. The promotion between Jepsen, Idol, and Coke kicks off this week and will continue up through the show's season finale in May. There, Jepsen will take to the stage to perform the final song as voted on by viewers. As we said earlier, you won't actually be jotting down your own ideas for what makes a killer pop verse; instead, participants will merely vote between three provided lyrical phrases each week. Let's just say you're not composing the next White Album — a point the video at Idol's website effortlessly hammers home. Still, we imagine the grand prize of this "Perfect Harmony" promotion" — a trip to the American Idol finale — will get tweens everywhere hitting the "vote" button at a feverish pace.