Margo Oberg (01 of21)
Open Image ModalMargo Oberg is a three-time world surfing champion from the United States. She won her first world title in 1977, then won back-to-back titles in 1980 and 1981. (credit:Facebook )
Serena Williams (02 of21)
Open Image ModalSerena Williams returns a ball against Danish Caroline Wozniacki during their match of the Madrid Masters on May 10, 2012 at the Magic Box (Caja Magica) sports complex in Madrid. Williams won 1-6, 6-3, 6-2. (credit:DOMINIQUE FAGET/AFP/Getty Images)
Jenny Thompson (03 of21)
Open Image ModalU.S. swimmer Jenny Thompson from Dover, N.H. practices with paddles 24 July 1992. Thompson is favored to win several gold medals during the women\'s individual events. (credit:PAUL VREEKER/AFP/Getty Images)
Mia Hamm (04 of21)
Open Image ModalUSA woman\'s soccer player Mia Hamm prepares to center the ball during a practice session at Rice Eccles Olympic Stadium 13 June 2003 in Salt Lake City, Utah. The US will play Ireland in a friendly match 14 June, 2003, in Salt Lake City. (credit:GEORGE FREY/AFP/Getty Images)
Gracia Leydon-Mahoney(05 of21)
Open Image ModalGracia Leydon-Mahoney competes in the women\'s 10-meter platform final at the U.S. Olympic diving trials, Sunday, June 24, 2012, in Federal Way, Wash. (credit:AP Photo/Elaine Thompson)
Brittney Griner and Chiney Ogwumike(06 of21)
Open Image ModalBrittney Griner #42 of the Baylor Bears reaches for a rebound in the second half against Chiney Ogwumike #13 of the Stanford Cardinal during the National Semifinal game of the 2012 NCAA Division I Women\'s Basketball Championship at Pepsi Center on April 1, 2012 in Denver, Colorado. (credit:Doug Pensinger/Getty Images)
Mary Lou Retton (07 of21)
Open Image ModalMary Lou Retton during the 1984 Olympics in Los Angeles where she took first overall. (credit:Steve Powell/ALLSPORT Getty Images)
Elena Hight (08 of21)
Open Image ModalElena Hight practices for the ladies snowboard halfpipe finals during the U.S. Snowboarding and Freeskiing Grand Prix on March 3, 2012 in Mammoth, California. Hight went on to win the event. (credit:Ezra Shaw/Getty Images)
Gail Devers(09 of21)
Open Image ModalAt the World Championships in Athletics, under the auspices of the International Association of Athletics Federations, in Seville, Spain, 1999. (credit:Facebook)
Julie Zetlin (10 of21)
Open Image ModalUS athlete Julie Zetlin performs with the ribbon in the qualifying round during the 31st Rythmic Gymnastics World Championships on September 22, 2011 in Montpellier, southern France. (credit:SYLVAIN THOMAS/AFP/Getty Images)
Michelle Kwan (11 of21)
Open Image ModalMichelle Kwan competes in the short program during the State Farm U.S. Figure Skating Championships January 8, 2004 at Philips Arena in Atlanta, Georgia. (credit:Matthew Stockman/Getty Images)
April Ross(12 of21)
Open Image ModalApril Ross dives for a ball during the AVP Hermosa Beach Open at the Hermosa Beach Pier on July 17, 2010 in Hermosa Beach, California. (credit:Photo by Jeff Gross/Getty Images)
Laila Ali and Shelley Burton (13 of21)
Open Image ModalLaila Ali (R) of the US gets caught by a punch from Shelley Burton of the US during their WBC Super Middleweight Championship fight, 11 November 2006, at Madison Square Garden in New York. (credit:TIMOTHY A. CLARY/AFP/Getty Images)
Emily Jackson (14 of21)
Open Image ModalEmily Jackson competes in the women\'s K1 of the 2012 U.S. Olympic Trials for Whitewater Slalom at the U.S. National Whitewater Center on April 14, 2012 in Charlotte, North Carolina. (credit:Tyler Lecka/Getty Images)
Danielle Carruthers(15 of21)
Open Image ModalDanielle Carruthers competes in the women\'s 100 meter hurdles semi-final during Day Two of the 2012 U.S. Olympic Track & Field Team Trials at Hayward Field on June 23, 2012 in Eugene, Oregon. (credit:Christian Petersen/Getty Images)
Neva Day (16 of21)
Open Image ModalNeva Day of the USA in action during qualifying for the Women\'s Indiviual Pursuit at the UCI Track Cycling World Cup Classic at the Manchester Velodrome on February 24, 2007 in Manchester, England. (credit:Bryn Lennon/Getty Images)
USA Team Synchro Swimmers (17 of21)
Open Image ModalUSA team synchro swimmers perform 24 March 2007 at the Susie O\'Neill pool in Melbourne during the team free routine final of the 12th FINA World Swimming Championships. Russia won gold in the event with Spain taking silver and Japan the bronze. USA placed fifth. (credit:WILLIAM WEST/AFP/Getty Images)
Hyleas Fountain (18 of21)
Open Image ModalHyleas Fountain of United States competes in the shot put in the women\'s heptathlon during day three of the 13th IAAF World Athletics Championships at the Daegu Stadium on August 29, 2011 in Daegu, South Korea. (credit:Mark Dadswell/Getty Images)
Michelle Wie(19 of21)
Open Image ModalMichelle Wie hits a shot during the first round of the LPGA LOTTE Championship Presented by J Golf at the Ko Olina Golf Club on April 18, 2012 in Kapolei, Hawaii. (credit:Photo by Jeff Gross/Getty Images)
Lindsey Vonn (20 of21)
Open Image ModalLindsey Vonn of US competes during the women\'s first run of Alpine skiing World Cup slalom final in Schladming on March 17, 2012. (credit:SAMUEL KUBANI/AFP/Getty Images)
Florence Griffith-Joyner (21 of21)
Open Image ModalFlorence Griffith-Joyner won three Olympic gold medals at the Seoul Games in 1988. (credit:Facebook )