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According to TMZ, Houston was almost kicked off the flight for refusing to buckle her seat belt.
A flight attendant initially asked her to do so and a second crew member was called over to the situation. The crew member essentially warned the star that if she didn't comply she would need to leave the plane.
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In the end, a flight attendant fastened the belt for Houston and the plane took off without issue.
FoxNews.com reports that Houston was on her way to begin filming a new movie. "Sparkle," perhaps?