Get up close with the B&B models.
Did you know the women portraying the Beauty and the Beast Corps are models in real life? And did you happen to get the Camera from the pre-Act 3 Mission Briefing (look behind Sunny's desk)? Here's what we did with Raging Beauty (the general technique works with all of them):

Start by not shooting her too often and run to the top floor of the building. Eventually she'll get upset and a come toward you faster with a green aura. Shoot her a couple of times to calm her down (and keep the rest of the world monochrome), then wait again for a few moments (still running around) until she starts sounding painful and the area turns into a white void with a 3-minute timer. Take out the Camera and once it's out, she'll stop and strike a few poses. Don't get too close (like, an inch away), or she'll attack. Finish her off before time is up! Demonstration video:
Done taking pictures? How about a nice dance?
When you're done playing photographer, equip the iPod and select the "Oishii Two-Han Seikatsu" song. Go back to the game, wait a second, and watch your Beauty do a jig!