I'd say Kimora and Jessica and Lohan and Victoria Beckham. I don't know why people are saying Jolie. Maybe I'm naive, but I've only seen her carry like 2 or 3 LVs.
I say angelina jolie because i don't judge an LV fan by how many bags they have, but by how they care for their bags. Jessica simpson surely does have a lot, but she carries the "IT" bags. New season, new bag for Ms. Simpson. I wonder if its more status symbol or a genuine love for LV that has Jessica carrying them. If you look at angelina jolie's bags you can tell that she cares for her bag. The patina is gorgeous and it gets used.