The mascara with one of the highest ratings on Sephora and the one you must absolutely get if you can only buy one mascara is Lancome Lash Idole Lash-Lifting & Volumizing Mascara ($26). This mascara has an average rating of 4.5 stars with nearly 7,000 reviews. The formula contains white tea extract to condition your lashes, while the curved brush makes your lashes look like they just got a perm.

The end result: Long, lush lashes that have a fanned out, feathery look. Editorial makeup artist Ammy Drammeh told Vanity Fair, "I personally like mascara that adds volume and length. Lancome Lash Idole does that, plus it helps lift the lash from the root." She added that it's smudge-resistant and long-lasting.

With any of these mascaras, you'll no longer have to worry about it clumping or smudging off as you cry watching those touching Hallmark Christmas movies.