Houston was also in a detoxication centre a year ago, in March, 2004.
Houston, 41, was working with producer Clive Davis on a new ablum when she was taken to the centre.
Recently, the star had to be hospitalized for a serious case of food poisioning.
The singer is best known for her son "I Will Always Love You", and her for work in the 1992 film The Bodyguard. She has been married to R&B singer Bobby Brown since 1992, and have one daughter. The couple is also known for having a rocky marriage.