Jamie Lynn Spears is shutting down Britney fans who have spoken negatively about her older sister. Earlier this week, Jamie Lynn re-posted a message from singer Halsey, which urged people not to make light of other's struggling with their mental health.Writing in the caption alongside Halsey's comments, Jamie Lynn added:"If you deal with mental illness or care for someone dealing with mental illness, then you know how important it is to respect the situation with privacy for the person, and the family trying to protect their loved ones, no matter how it may appear to the public, and as the public we must learn to do the same.