Whitney Houston Enters Rehab as 'Waiting to Exhale' Sequel Talks Start

Whitney Houston has voluntarily entered rehab again.

Spokesperson Kristen Foster says the singer, 47, is in an out-patient program for drug and alcohol treatment, part of Houston's "long-standing" recovery process.

Houston, who has battled problems with drug addiction for years, declared herself clean in 2009, the same year she released a comeback album. She has since delivered a series of shotty live performances.

It's unclear how long she will be in rehab or where she's being treated; Foster had no further comment.

Meanwhile, Angela Bassett, Houston’s costar in 1995’s Waiting to Exhale, says a sequel is in the works, USA Today notes.

During a recent appearance on CBS' The Talk, Bassett said Terry McMillan's 2010 follow-up novel, Getting to Happy, will be made into a feature film, with the original Exhale cast returning.

Forest Whitaker has signed on to direct, she added, and McMillan will pen the Happy screenplay.

No word on a release date.