Conversation so far:
What celebrities has Oprah Winfrey interviewed?
In 1993, Oprah Winfrey hosted a rare prime-time interview with Michael Jackson.
Who else has Oprah Winfrey interviewed besides Michael Jackson?
On September 10, 2007, David Letterman made his first appearance on The Oprah Winfrey Show, as its season premiere was filmed in New York City.
When did Oprah Winfrey appear on the late show?
On December 1, 2005, Oprah Winfrey appeared on the Late Show with David Letterman to promote the new Broadway musical The Color Purple.
Did she appear on David Letterman's Late Show more then once?
Did she do any other high profile interviews besides Michael Jackson and David Letterman?
In an interview with Oprah Winfrey, Lance Armstrong admitted for the first time that he doped to win all seven of his Tour de France titles, after years of denial.
Did Oprah Winfrey ever interview a president after they were elected?
In May 2011, Oprah Winfrey interviewed U.S. President Barack Obama and First Lady Michelle Obama, her first-ever interview with a sitting president and First Lady.
Has Oprah Winfrey ever said what her favorite celebrity interview was?
Oprah Winfrey said that the first person she loved interviewing was actor and director Sidney Poitier and the other was Salma Hayek.
Does Oprah Winfrey still do celebrity interviews?
Are there any other interesting aspects about the Oprah Winfrey article?
In 2009, Oprah Winfrey was criticized for allowing actress Suzanne Somers to appear on her show to discuss hormone treatments that are not accepted by mainstream medicine

Question: How did this effect her career?
Self-contained rewrite: How did Oprah allowing actress Suzanne somers to appear on her show to discuss hormone treatments that are not accepted by mainstream medicine effect her career?