We love how nail polish has the power to transform your whole look, but in the case of these color-changing nail polishes that transformation is taken quite literally. In The Mood by Perfect Formula is a line of "mood-changing" polishes that change color as your body temperature cools down or heats up. We were totally obsessed with the concept, so we HAD to try them out for ourselves and see if they really worked. Check out our video review!

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