Whitney Houston still battling old demons

Whitney Houston checked into rehab because she “has a problem with both drugs and booze” sources say.

The 47-year-old singer who has a history of substance abuse issues voluntarily entered an out-patient rehab program earlier this month, her rep recently confirmed.

And sources say she did so because Whitney’s still battling her old demons.

“Whitney has a problem with both drugs and booze,” an insider told American tabloid the National Enquirer.

“Whitney will mix drugs and margaritas.”

Whit­ney is scheduled to executive-produce a sequel to Waiting To Exhale, one of her movie hits. She’s also planning to record the soundtrack.

“But nothing can start on the movie till Whitney gets her act together,” added the insider. “Now that Krissi and Whitney are getting help together, there is finally some hope that they will get clean and sober.”