The Walk Hard: The Dewey Cox Story star was convinced photographers were tracking her when she saw a swarm of snappers during a recent trip to her doctor.
But Fischer was deflated when she realised they were really chasing Christina Ricci.
She reveals, "I was driving to a doctor's appointment when men with cameras jumped out of SUVs. I thought, 'It's starting.'
"Then they ran down the street to shoot Christina Ricci. One slammed into me, and we exchanged numbers, but no-one noticed me."
Source: WENN