In her new book Remembering Whitney, Whitney Houston's mother, Cissy, opens up about her daughter's tragic death. On "Oprah's Next Chapter," Cissy talks to Oprah about the day she found out Whitney had passed. Whitney's brother called his mother in hysterics, unable to articulate that Whitney was found in the bathtub. Watch Oprah's interview with Cissy Houston on "Oprah's Next Chapter," Monday, January 28, at 10 p.m. ET.