Bikinis at Every Age

UPDATED 06/28/2010 at 01:00 AM EDT • Originally published 06/28/2010 at 01:00 AM EDT

20s

20 EMMA WATSON

21 NINA DOBREV

22 ANNALYNNE MCCORD

23 KRISTIN CAVALLARI

24 MEGAN FOX

25 KATY PERRY

26 AMERICA FERRERA

27 CARRIE UNDERWOOD

28 SERENA WILLIAMS

29 KIM KARDASHIAN

30s

30 STACY KEIBLER

32 KARINA SMIRNOFF

35 MEL B.

36 JEWEL

37 CAMERON DIAZ

39 KELLY RIPA

40s

41 STEPHANIE SEYMOUR

42 PAMELA ANDERSON

44 TEA LEONI

45 TERI HATCHER

46 NICOLLETTE SHERIDAN

47 DEMI MOORE