Tara Reid -- Famously Unknown

Shopping on paparazzi doorstep Robertson Blvd. yesterday, Tara Reid was surrounded by a legion of snappin' paps and fans. Wait, go back. Tara ... who?

After whats-her-name scooted into a shop, a TMZ photog went around asking people if they could identify the fallen starlet.

You won't believe the photog-to-fan ratio!