3. Raquel Welch in One Million Years B.C. (1966)
In a move that would surely have PETA up in arms, Raquel Welch made her sex-symbol debut in an animal-skin bikini. The response to her pinup-worthy look made One Million Years B.C. a certified box-office hit. The bikini made it Welch's most renowned film, and even aided the advancement of fashion by the two-piece becoming an "It" item.