Bobby Brown was first introduced to cocaine by ex-wife Whitney Houston.
The former drug addict - who was married to 'I Will Always Love You' singer Whitney from 1992 to 2006 - has revealed shocking details of the couple's relationship in his autobiography 'Bobby Brown: The Truth, the Whole Truth and Nothing But', due out next month.
He writes: "I never used cocaine until after I met Whitney. Before then, I had experimented with other drugs, but marijuana was my drug of choice. At one point in my life, I used drugs uncontrollably. I was using everything I could get my hands on, from cocaine to heroin, weed and cooked cocaine."

Janet Jackson will be honoured by the Gay and Lesbian Alliance Against Defamation (GLAAD) this month.
The 'Feedback' singer is set to be recognised by the organisation for working to combat prejudice against sexuality in the music industry.
She will be presented with the Vanguard Award by US talk show host Ellen DeGeneres at the organisation's Media Awards in Los Angeles' Kodak Theatre on April 26.
Janet said: "I have received a number of awards throughout my career, but I am so proud to be receiving the Vanguard Award from GLAAD.

Madonna still enjoys a steamy sex life with husband Guy Ritchie.
The '4 Minutes' singer - who turns 50 in August - says despite being married for over seven years, she and 'Snatch' director Guy still make time to be alone together.
The mother-of-three told Britain's OK! magazine: "I don't know who told you that having children and getting married means there is no erotica in your life."
Earlier this month, Madonna vehemently denied reports her marriage to Guy is on the rocks. Liz Rosenberg, Madonna's US spokeswoman, said: "I am delighted to confirm that Mr. and Mrs. Guy Ritchie remain happily married.