Hath she no loyalty!?
A source says:
"Brad is dressing Demi for the Oscar parties, and he also dressed her at Sundance. Rachel is furious. Brad assisted her in styling Demi. Now she feels betrayed."
We have a feeling this switch is only a temporary thing.
Since Rachel's going to be giving birth next month, Demi probably didn't want her to stress out over dresses.
Just a thought.
[Image via Adriana M Barraza/WENN.]