For a flawless, summer look, you need a hydrating foundation primer. Check out Laura Mercier’s Hydrating Primer for a hydrating barrier between your skin and your makeup. This lightweight formula is the best skin preparation before applying your makeup for a smooth, flawless look. Here is Mel’s review on her new favorite primer! As well as her quick tips of either mixing your primer with your foundation for a tinted moisturizer effect or sticking the primer in the fridge overnight for a soothing and cooling effect.