If you ever doubted that Katy Perry has some serious pipes, prepare to have those doubts extinguished.

"Unconditionally" is lyrically simple ("I will love you unconditionally/There is no fear now/Let go and just be free.") and musically epic. Tribal drums pound throughout without overstaying their welcome, as Perry matches the intensity with some seriously powerful vocals. It's her best showcase and the best song from Prism so far (after "Roar," "Walking On Air," "Dark Horse" and the leaked "Birthday").

We're not even bothered that her emphasis on the titular word is on the "tion." It's that good.