I've always been a Roar detractor, because I hated the whole concept of the song and video. But this is amazing I knew she'd give PRISM the singles/videos it deserved.
Firework doesn't have a storyline right? But you can still get the message out of the video. I think Unconditionally is her FW in PRISM, different stories in one video...
Most likely the video is coming out on the week of AMA - streaming + sales from video exposure/AMA performance + a fairly strong airplay = her next #1.