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How many problems can one Houston have? TMZ.com reports that Whitney Houston has opted for additional rehabilitation after completing a 30-day program earlier this week.

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Little is known on the nature of the additional rehab, although TMZ's anonymous source says Houston has a round-the-clock life coach on hand. Houston, who has publicly battled with alcohol and drug abuse for years, "really wants it this time," according to a source regarding Houston's sobriety.

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When Houston started rehab last month, it was accompanied by whispers that she was getting clean for the forthcoming film adaptation of Terry McMillan's Waiting to Exhale sequel, Getting to Happy. Houston's daughter, Bobbi Kristina Brown, confirmed late last month via Twitter that her mother would be reprising her role of Savannah from the 1995 dramedy.