Dorfmann, 48, has as many as 6,025 of the iconic dolls.
The obsessed Barbie fan has accommodated the dolls in a bedroom, her cellar and half the kitchen in her house.
She plans a collection of at least 10,000 dolls.
`There`s probably nothing I don`t know about Barbie,` the Mirror quoted her as saying.
`I guess I`m obsessive but I have just liked them since I was a little girl. People say I look like Barbie - although I don`t go out of my way to look like her. My hair is naturally blonde,` she added.
As the Barbie turns 50 next month, Dorfmann has decided to move her own birthday two days further so that they can celebrate on the same day.
`Barbie`s birthday is on March 9 and mine`s on March 7, but I thought we might as well have a party on the same day. Barbie`s got a better figure than me but I think we`ve both aged well,` she said.
`There`s nothing I would change about Barbie. I know her legs are too long and her feet too small, but that makes her Barbie,` she added.