Is that a bruise? Little Mix fans are curious about a black mark on Jesy Nelson's stomach

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Jesy Nelson shows off her flat stomach. Credit: Instagram/jesynelson

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Singer Jesy Nelson sparks concerns with mystery mark on stomach. Credit: Instagram/jesynelson

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Little Mix's Jesy Nelson's sparks concern from fans as she reveals a strange mark on her stomach. Credit: Instagram/jesynelson

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Fans Spot Strange Dark Mark on Jesy Nelson's Stomach. Credit: Instagram/jesynelson

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Jesy Nelson flaunts her curves. Credit: Instagram/jesynelson

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