Brooke Shields guest starred on Friends as a crazy stalker / fan of Joey.
Added:

Friends Season 2 Episode 12 Quotes

You deserve much better than me, Erika. You deserve to be with the real Drake. He's the one you fell in love with. Go to Salem, find him. He's the guy for you.

Joey

Erika: Oh, Drake, isn't it amazing?
Joey: Yeah it is... what?
Erika: Well, here we sit, devil may care, just a little while ago you were reattaching someone's spinal cord.
Joey: Yeah, that was a tricky one. In reality, that operation takes like, over 10 hours, but they only showed it for two minutes.
Erika: Who's they?
Joey: No one.