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40 & Foxy!

The truth is out there: "X-Files" star Gillian Anderson turned 40 on August 9. (Photo by Stephen Shugerman/Getty Images)

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Jennifer Lopez The newest member of the "40 and Foxy" club, J. Lo celebrated the big 4-0 on Friday.

Actress Jennifer Lopez arrives at the 'Noche de Ninos Gala' benefiting Childrens Hospital of Los Angeles at the Beverly Hilton Hotel on May, 9, 2009 in Beverly Hills, California. (Photo by Kevin Winter/Getty Images)
Halle Berry Academy Award winner, new mom and total hottie Halle Berry turned 42 on August 14, 2008. Her boyfriend and the father of her child is model Gabriel Aubry, who is 10 years younger than Berry. (Photo by Jason Kempin/Getty Images)
Demi Moore Like Halle Berry, actress Demi Moore prefers younger men - and when you look like this at 45, why not? Moore's companion is actor Ashton Kutcher, who is 30. (Photo by Alberto E. Rodriguez/Getty Images)
Salma Hayek Sultry star Salma Hayek is a new mom AND just turned 42 on September 2nd. (Photo by Frederick M. Brown/Getty Images)
Vanessa Williams Actress, singer and former Miss America Vanessa Williams is no "Ugly Betty" at any age, but it's hard to believe this youthful-looking lady turned 45 on March 18, 2008. (Photo by Todd Williamson/Getty Images for TV Land)
Brooke Shields This "Pretty Baby" is all grown up - Shields turned 43 on May 31 - but the mother of two is still as stunning as when she purred " nothing comes between me and my Calvins." (Photo by Scott Wintrow/Getty Images For V-Day)
Lucy Liu She's not quite there yet, but this "Charlie's Angel" will be 40 on December 2, 2008. (Photo by Michael Buckner/Getty Images)
Rachael Ray Culinary superstar, media mogul and star of a legendary sexy photo spread in FHM, Rachael Ray celebrated her 40th birthday on August 25, 2008 by jumping out of an airplane. (Photo by Frederick M. Brown/Getty Images)
Ashley Judd Is it good genes or a gorgeous husband like Scottish race car driver Dario Franchitti that keeps Ashley Judd looking like a 22-year-old? The actress turned 40 on April 19. 2008. (Photo by Vince Bucci/Getty Images)
Julia Roberts The original "Pretty Woman" just seems to get more gorgeous with every passing year. Roberts turns 41 on October 28, 2008. (Photo by Kevin Winter/Getty Images)
Gillian Anderson The truth is out there: "X-Files" star Gillian Anderson turned 40 on August 9. (Photo by Stephen Shugerman/Getty Images)
Molly Ringwald Yes, the star of "Sixteen Candles" blew out 40 of them on her last birthday cake. The John Hughes muse who channeled angst on the big screen for teenagers everywhere turned 40 on February 18, 2008. She's pictured here with fellow Hughes alum Anthony Michael Hall. (Photo by Frazer Harrison/Getty Images for AFI)
Debra Messing Do redheads just age better? "Will and Grace" star Debra Messing looks flawless at 40. She was born on August 15, 1968. (Photo by Kevin Winter/Getty Images)
Sandra Bullock She often plays goofy girls-next-door, but sexy Sandy is definitely a woman. The actress-producer celebrated her 44th birthday on July 26, 2008. (Photo by Peter Kramer/Getty Images)
Courteney Cox Jennifer Aniston's favorite "Friend" turned 44 on June 15. (Photo by Mark Mainz/Getty Images)
Jane Krakowski Jane Krakowski, who stars as ditzy actress Jenna Maroney on "30 Rock" will be 40 on October 11, 2008. (Photo by Brad Barket/Getty Images
Naomi Watts Awesome Aussie Naomi Watts turns 40 on September 28, 2008. The gorgeous mum-to-be is expecting her second child with actor Liev Schreiber. (Photo by Jason Kempin/Getty Images)
Nicole Kidman Fellow Awesome Aussie and Naomi's best friend Nicole Kidman marked her 41st birthday on June 20, 2008 and gave birth to daughter Sunday Rose just a few weeks after. (Photo by Stephen Lovekin/Getty Images)
Michelle Yeoh Is it the martial arts that keep the "Crouching Tiger, Hidden Dragon" star in fighting shape at 46? (AP Photo/Lai Seng Sin)
Elizabeth Hurley The "Austin Powers" star is a very shaggable 43. (Photo by Pascal Le Segretain/Getty Images)
Kristin Davis The 43-year-old star helped put the "sexy" in "Sex and the City." (AP Photo/Richard Drew)
Kristin Chenowet... "Pushing Daisies" star and Tony Award-winner Kristin Chenoweth hit the big 4-0 on July 24. (Photo by Stephen Shugerman/Getty Images)
Diane Lane Former child star Diane Lane turned 43 on January 22, 2008. (Photo by Frazer Harrison/Getty Images)
Patricia Arquett... We'd like to know the psychic secret behind "Medium" star Patricia Arquette's immaculate skin. The actress turned 40 on April 8, 2008. (Photo by Alberto E. Rodriguez/Getty Images)
Vivica A. Fox "Kill Bill" star Vivica is still a super-fox at 44. (AP Photo/Earl Gibson III)
Kate Walsh "Grey's Anatomy" tough cookie Kate Walsh will be 41 on October 13, 2008. (AP Photo/Matt Sayles)
Maria Bello "The Mummy" actress turned 41 on April 18, 2008. (AP Photo/Dan Steinberg)