Sony PicturesSparkle, the movie that marks Whitney Houston's movie swan song and American Idol star Jordin Sparks' big-screen debut, is set to open August 17.  A red-carpet premiere is planned for the film, but a report suggests that Houston's family is making things difficult in terms of scheduling.

While premieres normally take place at least a week before a movie opens, Showbiz411.com claims that Sparkle's is tentatively scheduled for the day before the movie hits theaters because of the demands of Whitney's family.  Sources tell the website that the family doesn't want the premiere to be held on any date that's near August 9, which would have been Whitney's 49th birthday.

In addition, sources tell Showbiz411.com that the question of which family members will be attending, including Whitney's daughter, Bobbi Kristina, and her mom, Cissy Houston, is also "very much up in the air."  On top of that, the location of the premiere is upsetting the family.  "I'm surprised they're having it in Los Angeles, where Whitney ****," said a source.  "They should be having it in New York."

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