The Youngest Power Women

Lady Gaga
Age: 24

An American artiste, whose debut album, The Fame, reached number one in the UK, Canada, Austria, Germany and Ireland, and reached the top-ten in numerous countries worldwide. She has sold more than 15 million albums and 51 million singles worldwide. (AP)

Danica Patrick
Age: 28

An American auto racing driver, a model and an advertising spokeswoman. She was named the Rookie of the Year for both the 2005 Indianapolis 500 and the 2005 IndyCar Series season. With her win in the 2008 Indy Japan 300, Patrick became the first woman to win an Indy car race.(AP)

Serena Williams
Age: 28

A professional tennis player who has been ranked as the World No. 1 singles player by the Women's Tennis Association on five separate occasions. On July 3, 2010, she became sixth on the all-time greatest champions list.(AP)

Beyonce Knowles

Age: 29

Beyoncé Knowles is a singer, songwriter, actress and fashion designer. According to Sony, her total album and single sales have surpassed 100 million. In 2009, Billboard listed her as the most successful female artist of the 2000s decade and the top Radio Artist of the decade. In February 2010, the RIAA listed her as the top certified artist of the decade.(AP)

Gisele Bundchen

Age: 30

One of the best-paid new mothers of 2010, the supermodel raked in $25 million in the year she gave birth to her first son, Benjamin, with NFL quarterback Tom Brady. Just six weeks after giving birth, Bundchen was back in top model shape for the Spring 2011 ad campaign of Brazilian sportswear line Colcci.(AP)

Venus Williams

Age: 30

A professional tennis player ranked World No. 1 in singles by the Women's Tennis Association on three separate occasions. With 43 career singles titles, Williams along with Justine Henin leads active players on the WTA Tour and is tied for 10th overall in all-time titles.(AP)

Chelsea Handler

Age: 35

An American stand-up comedian, humorist, television host, actress, model, and best-selling author. She has her own late night talk show Chelsea Lately on the E! Cable Television Network. In 2009 she won a Bravo A-List Award.(AP)

Angelina Jolie

Age: 35

A UN Goodwill Ambassador and two-time Davos speaker, she's also opened her wallet. Jolie's all-girls school in Afghanistan opened its doors to 800 students this year, and she donated $1 million to help Haiti rebuild and another $100,000 for the flood relief efforts in Pakistan.(AP)

Stephenie Meyer

Age: 36

American author best known for her vampire romance series Twilight. The Twilight novels have gained worldwide recognition and sold over 100 million copies globally, with translations into 37 different languages. Meyer is also the author of the adult science-fiction novel The Host.(AP)

Heidi Klum

Age: 37

The German-born supermodel has been a Victoria's Secret angel for more than a decade, taking her first steps down the runway in 1997. As the host of Project Runway, Klum has taken her image from just a pretty face to a fashion force with a critical eye.(AP)

Rachel Maddow

Age: 37

American radio personality, television host, and political commentator. Maddow is the first openly gay anchor to be hired to host a prime-time news program in the United States.(AP)

Queen Rania Al Abdullah

Age: 40

In addition to her efforts on behalf of education, human rights and women's issues, Jordan's monarch focused this year on bridging gaps between the U.S. and the Middle East.(AP)

Sheryl Sandberg

Age: 41

The COO of Facebook has done a lot to help the social network grow up in 2010, including addressing major public scrutiny over revised privacy terms.(AP)

Carla Bruni-Sarkozy

Age: 42

Italian-born French songwriter, singer, and former model. Since February 2008, she has been married to the President of the French Republic, Nicolas Sarkozy.(AP)