Answer:
The fabulous actress who has lost the best actress Oscar award 18 times is Meryl Streep.
Explanation:
Meryl Streep has called for 21 Oscar nominations in the Academy Awards history.
She won three of those races and she became one of the members of the exclusive three-timers club.
She has been nominated 21 times for an Oscar and won three times:
The Best Supporting Actress in Kramer vs Kramer (1979)
The Best popular Actress in Sophie's Choice (1982)
The Best popular Actress in Iron Lady (2011)