But (and I admit, I have a full-fledged lash obsession) those wily labcoats at Lancome have gotten me hooked on their mascara primer, Lancôme Oscillation PowerBooster. I've been a fan of their battery-powered Oscillation mascara since it came out about two years ago, so I already knew the power of the pulse. Used in combo with mascara, the Oscillation PowerBooster is like a shoe lift —nobody knows it's there, but it makes you taller—or, in this case, makes your lashes longer. $39 at Saks.com