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Carl Lewis; Jackie Joyner Kersee and Al Joyner; Bart Conner; Nadia Comaneci; Mary Lou Retton; Shawn Johnson; Greg Louganis; Janet Evans; Mark Spitz.

Source: OWN

Oprah Winfrey conducts a Barbados-based interview with pop star Rihanna, who casts light on her career, family, fame and her relationship with Chris Brown.

Source: OWN

Oprah Winfrey interviews Olympic gymnast Gabby Douglas in West Des Moines, Iowa. The installment includes a chat with Douglas' mother, plus a visit to the gym where Douglas trained.

Source: OWN

Oprah Winfrey interviews Kelsey Grammer, who casts light on his 2011 divorce, his battle against addiction, his series "Boss" and the tragedies in his life. Also: a chat with his wife, Kayte Walsh.

Source: OWN

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Oprah Winfrey interviews music artist Usher, who shares insight into his personal life.

Source: OWN

Oprah Winfrey chats with funnyman Stephen Colbert in Charleston, S.C. Colbert addresses his private life, his faux-newsman alter ego, his friendship with Jon Stewart and the tragedies in his life.

Source: OWN

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Singer-songwriter Fergie is the guest.

Source: OWN

Oprah chats with Bette Midler in New York City, where the singer discusses her career and recent projects. Also: an interview with Valerie Simpson, of the songwriting duo Ashford and Simpson.

Source: OWN

Teen pop sensation Justin Bieber discusses his career, the pitfalls of fame and life in the spotlight.

Source: OWN

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Oprah visits the set of the TV drama "Scandal" for an interview with series star Kerry Washington and creator Shonda Rhimes.

Source: OWN

Jamie Foxx is the guest.

Source: OWN

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David Letterman is interviewed from the campus of his alma mater, Ball State University in Muncie, Ind.

Source: OWN

Lance Armstrong is interviewed from his home in Austin.

Source: OWN

Conclusion. Lance Armstrong addresses the doping scandal in an interview from his hometown of Austin.

Source: OWN

Drew Barrymore is interviewed from her home in California.

Source: OWN

LL Cool J discusses his career and personal life.

Source: OWN

Whitney Houston's mother, Cissy Houston, is interviewed from her New Jersey home.

Source: OWN

An interview with pop superstar Beyoncé.

Source: OWN

Oprah meets the Wayans brothers.

Chelsea Handler talks about her boyfriend, her DUI, her relationship with her father and her show.

Oprah meets spiritual healer John of God. She also looks at some controversial surgeries.

Supreme Court associate justice Sonia Sotomayor; Facebook COO Sheryl Sandberg.

Source: OWN

Jane Fonda and her adopted daughter Mary Williams are interviewed.

Source: OWN

Tennis playing superstars and sisters Venus and Serena Williams talk to Oprah.

Oprah interviews NBA player Jason Collins, who is the first openly gay athlete in a major American sport. Included: remarks by Collins' family.

Source: OWN

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