18 of 23:
1995: Courteney Cox - Now known as Courteney Cox-Arquette following her 1999 marriage to actor David Arquette, this 45-year-old actress played spaztastic sweetheart Monica in the hit sitcom 'Friends' with Jennifer Aniston. Cox-Arquette has starred in films such as 'Ace Ventura: Pet Detective' with Jim Carrey and the 'Scream' thriller movies, including the fourth installment, due on April 15, 2011. She also currently stars in the series 'Cougar Town'.
(ABC Photo / Craig Sjodin)