Celebrities after pregnancy: how do they look?

  • HOLYHEAD, WALES - AUGUST 30: Catherine, Duchess of Cambridge attends the start of The Ring O'Fire Anglesey Coastal Ultra Marathon on August 30, 2013 in Holyhead, Wales. (Photo by Paul Lewis - WPA Pool/Getty Images)

  • BEVERLY HILLS, CA - AUGUST 04: Actress Malin Akerman attends the Disney & ABC Television Group's '2013 Summer TCA Tour' at The Beverly Hilton Hotel on August 4, 2013 in Beverly Hills, California. (Photo by Paul A. Hebert/Getty Images)

  • NASHVILLE, TN - JUNE 05: Host Kristen Bell attends the 2013 CMT Music awards at the Bridgestone Arena on June 5, 2013 in Nashville, Tennessee. (Photo by Jason Merritt/Getty Images)

  • LAS VEGAS, NV - MAY 19: Musician Jennifer Nettles arrives at the 2013 Billboard Music Awards at the MGM Grand Garden Arena on May 19, 2013 in Las Vegas, Nevada. (Photo by Jason Merritt/Getty Images)

  • WEST HOLLYWOOD, CA - MAY 08: Recording artists Adam Levine (L) and Shakira attend NBC's 'The Voice' Season 4 Red Carpet Event at the House of Blues Sunset Strip on May 8, 2013 in West Hollywood, California. (Photo by Frederick M. Brown/Getty Images)

  • NEW YORK, NY - MAY 06: Claire Danes attends the Costume Institute Gala for the 'PUNK: Chaos to Couture' exhibition at the Metropolitan Museum of Art on May 6, 2013 in New York City. (Photo by Larry Busacca/Getty Images)

  • LAS VEGAS, NV - APRIL 29: Model and television personality Holly Madison arrives at the premiere of the show 'Pin Up' at the Stratosphere Casino Hotel on April 29, 2013 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images)

  • NEW YORK, NY - MARCH 16: Snooki attends the 24th Annual GLAAD Media Awards on March 16, 2013 in New York City. (Photo by Larry Busacca/Getty Images for GLAAD)

  • NEW ORLEANS, LA - JANUARY 31: Beyonce speaks onstage at the Pepsi Super Bowl XLVII Halftime Show Press Conference at the Ernest N. Morial Convention Center on January 31, 2013 in New Orleans, Louisiana. (Photo by Christopher Polk/Getty Images)

  • BEVERLY HILLS, CA - DECEMBER 07: Actress Megan Fox attends the 7th Annual March of Dimes Celebration of Babies, a Hollywood Luncheon, at the Beverly Hills Hotel on December 7, 2012 in Beverly Hills, California. (Photo by Michael Buckner/Getty Images For March Of Dimes)

  • BEVERLY HILLS, CA - DECEMBER 06: Actress Reese Witherspoon arrives at the Children's Defense Fund of California 22nd Annual Beat The Odds Awards at Beverly Hills Hotel on December 6, 2012 in Beverly Hills, California. (Photo by Mark Davis/Getty Images for CDF)

  • BEVERLY HILLS, CA - OCTOBER 15: Actress Uma Thurman arrives at ELLE's 19th Annual Women In Hollywood Celebration at the Four Seasons Hotel on October 15, 2012 in Beverly Hills, California. (Photo by Frazer Harrison/Getty Images)

  • HOLLYWOOD, CA - MARCH 01: TV personality Kourtney Kardashian attends Escape to Total Rewards at Hollywood & Highland Center on March 1, 2012 in Hollywood, California. (Photo by Michael Buckner/Getty Images for Caesars Entertainment)

  • BEVERLY HILLS, CA - JANUARY 15: Actor Natalie Portman arrives at the 69th Annual Golden Globe Awards held at the Beverly Hilton Hotel on January 15, 2012 in Beverly Hills, California. (Photo by Frazer Harrison/Getty Images)

  • HOLLYWOOD, CA - NOVEMBER 13: Singer/Actress Alecia Moore aka Pink attends the 'Happy Feet Two' Los Angeles Premiere at Grauman's Chinese Theatre on November 13, 2011 in Hollywood, California. (Photo by Jason Merritt/Getty Images)

  • NEW YORK, NY - NOVEMBER 09: Recording artist Mariah Carey poses at a press conference to announce that she is the new Jenny Craig Brand Ambassador at Four Seasons Hotel New York on November 9, 2011 in New York City. (Photo by Cindy Ord/Getty Images)

  • LOS ANGELES, CA - NOVEMBER 05: Actress Kate Hudson attends LACMA's Art And Film Gala Honoring Clint Eastwood And John Baldessari at LACMA on November 5, 2011 in Los Angeles, California. (Photo by Jason Merritt/Getty Images)

  • LOS ANGELES, CA - SEPTEMBER 18: Actress Jane Krakowski arrives at the 63rd Annual Primetime Emmy Awards held at Nokia Theatre L.A. LIVE on September 18, 2011 in Los Angeles, California. (Photo by Frazer Harrison/Getty Images)

  • BEVERLY HILLS, CA - MAY 11: Actress Hilary Duff attends An Evening of 'Southern Style' presented by the St. Bernard Project & the Spears family at a private residence on May 11, 2011 in Beverly Hills, California. (Photo by David Livingston/Getty Images)