Alec Mazo (born April 5, 1978) is a Russian-born American professional ballroom dancer based in San Francisco. He became known for his participation in the American edition of the reality television series Dancing with the Stars, the first season of which he won with partner Kelly Monaco.

Mazo, who is of Russian Jewish descent, has been dancing since he was five years old, and at age twelve, moved from Russia to San Antonio, Texas, and later to San Francisco, where his former engineer mother, Natasha, began a dance school. Mazo began studying dancing there at 16 in order to improve his socialization skills with girls, and to ease his back problems. He later studied computer science, and then cognitive science at the University of California at Berkeley, in the hopes of one day becoming a dance teacher.

Mazo worked as the CFO of the Genesis Dance Sport studio in San Francisco. Expanding the studio into Los Angeles has been one of his goals. He has one brother, Genya, who's also a ballroom dancer and has performed on the Dancing with the Stars tour. Alec Mazo is married to Dancing With The Stars costar and professional dancer Edyta Sliwinska.

Kelly Marie Monaco (born May 23, 1976) is an American model, actress, reality television contestant and winner of Dancing with the Stars in Season 1. She is well known for playing the character of Sam McCall on the soap opera General Hospital, a role she originated in 2003.

In April 1997, Monaco became the Playboy Playmate of the Month. Throughout her tenure with Playboy in the 1990s, Monaco was also featured in many Playboy Special Edition publications.

Monaco made numerous cover appearances in other magazines such as FHM and Maxim. Along with her Maxim cover feature in 2005, the magazine also placed her at #88 on their annual Hot 100 List in May 2006. In 2009, Monaco was named Maxim's number one sexiest cover model of the decade.

Monaco's first television role was on the nighttime drama Baywatch from 1997 to 1998. In addition to playing the role of Susan on the show, Monaco also was Carmen Electra's body double at times, as Electra could not swim^{[citation needed]}. Monaco also had minor roles in the late 1990s films BASEketball, Idle Hands, and Mumford.

Natalie Anne Coughlin (born August 23, 1982) is an American swimmer and eleven-time Olympic medallist.

At the 2008 Summer Olympics, Coughlin became the first American female athlete in modern Olympic history to win six medals in one Olympics and the first woman ever to win a 100 m backstroke gold in two consecutive Olympics.

Coughlin's success has earned her the World Swimmer of the Year Award one time and American Swimmer of the Year Award three times. She has won a total of forty-eight medals in major international competition, twenty-one gold, seventeen silver, and ten bronze spanning the Olympics, the World, and the Pan Pacific Championships.

Coughlin currently lives in Lafayette, California and is of Irish and one quarter Filipino heritage. She was born in Vallejo and went to school at St. Catherine of Siena School from kindergarten through eight grade. She attended Carondelet High School in Concord.

Coughlin first began swimming at the local YMCA when she was only 10 months old. In 1998 at age 15, she became the first swimmer to qualify for the Summer National in all 14 events. Prior to the 2004 Summer Olympics, Coughlin was a student-athlete at the University of California, Berkeley, where she earned a BA in psychology in 2005. Coughlin won 12 National Collegiate Athletic Association Swimmer of the Year honors in her first three years at Cal.

Karina Smirnoff (Ukrainian: Карiна Смiрнова; Russian: Кapинa Cмиpнoвa; born Karina Smirnova; January 2, 1978) is a Ukrainian professional ballroom dancer. She is best known for her appearances on Dancing with the Stars, where she held a runner-up title, a semi-final title, and several quarter final titles. Smirnoff finally became the champion professional partner in the thirteenth season, when she was partnered with army veteran and soap opera star J.R. Martinez.

She is also a five-time U.S. National Champion, World Trophy Champion, and Asian Open Champion. Smirnoff has won the title at the UK Open, is a three-time champion at the US Open, two-time champion at the Asian Open, five-time champion at the Dutch Open, and five-time US National Professional Champion. She has taken second at the British Open Blackpool Dance Festival and she is the first woman to also ever make the "British Professional Final" with three different partners.

Smirnoff was born Karina Smirnova in Kharkiv, Ukrainian SSR, Soviet Union on January 2, 1978. When she was five years old, she began taking ballet lessons, followed by gymnastics, aerobics, figure skating, ballroom dancing and piano. She chose to pursue ballroom dancing. In 1992, Smirnoff immigrated to the United States.

Toni Michelle Braxton (born October 7, 1967) is an American R&B singer-songwriter, record producer, and actress. Braxton has won six Grammy Awards, seven American Music Awards, and five Billboard Music Awards and has sold over 60 million records worldwide. She has a contralto vocal type.^{[citation needed]}

Braxton topped the Billboard 200 with her 1993 self-titled debut album and continued that streak with her second studio album Secrets, which spawned the number-one hits "You're Makin' Me High" and "Un-Break My Heart". Although she had successful albums and singles, Braxton shortly filed for bankruptcy, but then returned with her chart-topping third album, The Heat. In 2009, she returned to the spotlight with "Yesterday", a #12 R&B hit which serves as the first single off her new album Pulse, released on May 4, 2010, which debuted at #1 on Billboard R&B Album Chart. Braxton was involved in the 7th season of the reality show Dancing with the Stars. Her professional partner was Alec Mazo. She was voted off in week five of the competition. It was announced on October 6, 2010 that Braxton once again had filed for bankruptcy. A reality series entitled Braxton Family Values, starring Toni and her sisters, debuted April 12, 2011 on WE tv. WE tv ordered a 13-episode second season of the show after the third episode of the first season. On September 18, 2011, Braxton was inducted into the Georgia Music Hall of Fame.