Stage manager Dean sits with Oprah before the show starts.

When you have American Idol's most particular judge appearing on the show, everything has to be perfect! Stage manager Dean stands in for America's favorite Brit before the taping of Simon Cowell Reveals Some of the Most Talented People in the World.
Leona Lewis, Simon Cowell, Oprah and Dean

Should she stay or should she go? Oprah can't quite let go after a showstopping performance by British singer Leona Lewis, a Simon Cowell protégé and winner of British talent competition The X Factor.

Jamie Oliver and Carlana

She may have been only the third contestant eliminated from Oprah's Big Give, but Carlana proves there are no hard feelings between herself and judge Jamie Oliver.
Simon Cowell and Oprah

Oprah's Big Give contestants weren't the only ones making a difference on this show. Oprah and Simon Cowell head backstage after he paid the mortgage for a family struggling to stay afloat during their 3-year-old daughter's battle with cancer.
Dr. Oz and a Harpo staff member before the show

It's a historic Oprah Show event—and Dr. Oz is ready! The audience at Harpo Studios is filled with men only, and they can ask Dr. Oz anything. The doctor is on call as a Harpo employee talks to the audience just before the taping of 300 Men Ask Dr. Oz begins.
Dr. Oz and Oprah

After hosting a show full of "guy talk," Dr. Oz and Oprah share a laugh as she returns to the stage.
Oprah, Billy Ray Cyrus and Miley Cyrus

Teenage superstar Miley Cyrus, aka Hannah Montana, surprised a room full of fired-up superfans with a performance of her hit song "Best of Both Worlds." After the performance, her dad and Hannah Montana co-star Billy Ray Cyrus and Oprah come out to greet the adoring fans.
The crew finishes setting up before the segment.

When the cheers from Miley's performance subside, Oprah returns to the main studio to film a segment with Julia Prohaska, senior director of marketing for American Girl® dolls.
Celine Dion greets some audience members.

After serenading some of her most loyal fans on Fan Dreams Come True with Celine Dion, Celine says hello to audience members as she leaves the stage.
Celine, Rene and Oprah

Celine waves a last goodbye as she leaves the studio with her husband, René Angélil, with Oprah leading the way.

Oprah greets the audience as she enters the stage for the taping of Polygamy in America.