Oprah Winfrey's exclusive interview with Whitney Houston's daughter and sister-in-law/manager has given the media mogul's OWN TV network its biggest ratings.

More than 3.5 million people tuned in to watch the 90-minute cable TV special on Sunday night.

During the chat at Patricia Houston's Atlanta, Georgia home, Oprah landed the first interview with teenager Bobbi Kristina since her mother died.

The special aired on the one-month anniversary of Houston's death.