Oprah Winfrey was so nervous about interviewing Diana Ross, she sobbed in her bathtub the night before the show.

Talk show queen Winfrey worships the singing legend, and feared she wouldn't be able to control her emotions on air.

She tells US TV show Extra, "Not only nervous. I sat in the tub the night before she was coming on and cried myself out.

"I was worried that I would see her and not be able to control myself. Break down. So I had to get it out."