Houston’s 1986 Emmy Award also goes on sale.
Bobby Brown says the deaths of Whitney Houston and the couple’s daughter Kristina were “unimaginable”.
Houston drowned in a bathtub at the Beverly Hills Hilton hotel in 2012 following a cocaine overdose, while Kristina died in 2015 aged 22, after being found dead at the bathtub at her home.
Speaking to US TV show 20/20, Brown said: “I am completely numb at this time. Krissy was and is an angel. My family must find a way to live with her in spirit and honour her memory. Our loss is unimaginable.”
In the interview, due to be aired in full on July 7, Brown said that he and Brown took cocaine together shortly after they met. The couple married in 1992, divorcing 15 years later in 2007. Brown said of their divorce: “I came into the marriage with money, and I left the marriage with nothing.”
The news comes after California auction house Heritage Auctions announced it is selling off over 100 items of Houston memorabilia on June 24-25, including the Emmy statue Houston won in 1986, which is expected to raise £7,000.
After a No 1 single with ‘Candy Girl’ with the boyband New Edition, Brown enjoyed a successful solo career with hits including ‘My Prerogative’ and ‘Every Little Step’ before meeting Houston.
During their marriage, Brown had further success with ‘Two Can Play That Game’ in 1994, but he went 15 years between 1997’s album ‘Forever’ before releasing ‘The Masterpiece’ in 2012. He is due to release a new album, ‘Smoke’, this year.