20. Donna D'Errico
Worst Performances: Baywatch (TV series, 1996-1998), Candyman: Day of the Dead (1999)
In terms of Baywatch, Donna D'Errico is best described as "that other blonde chick with the huge boobs who's not Pamela Anderson," which, admittedly, isn't all that fair. But, see, we've seen D'Errico's performance in the forgettable 1999 horror sequel Candyman: Day of the Dead, so we're well aware that this exceptionally gorgeous Playboy Playmate turned actress won't be remembered in any other way.