CooCoo for TommyPuffs

Kate Holmes made a rare public appearance on Sunday at an In Style magazine girls-only party held at the home of a Hollywood producer.

"Katie looked dead in the eyes," one partygoer tells PerezHilton.com exclusively. "She was not the same person she was before she met Tom."

The soiree was a gathering of some of the industry's most influential women, and there was a strict rule along with the invite. "You weren't allowed to bring a guest with you," another partygoer tells us. "However, Katie brought a guest. One of her Scientology 'handlers.' She was the only one that didn't come alone. Katie's minder kept a watchful eye and a close distance at all times. It was so creepy! You couldn't really talk to her honestly and openly. Whenever Katie would leave the room, all the girls would talk amongst themselves about how strange she seemed and how bizarre the whole situation was."

Does anyone else think this whole thing is a little Rosemary's Baby-esque???