Britney Spears' niece Maddie was seriously injured in an ATV accident after the vehicle flipped over. TMZ reports that the 8-year-old was underwater and unconscious for several minutes before being airlifted to a nearby hospital. Her mother, Britney's sister Jamie Lynn Spears, was not with her daughter at the time of the accident. Our thoughts and prayers are with the 8-year-old and her family.
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