Pros Spill: "The Beauty Product I'm Obsessed With"
Some of the biggest names in the beauty biz reveal the beauty products that have changed their lives
Product: Laura Mercier Satin Lip Colour in Passion Fruit, $22
Why she loves it: Arnold says it is "a gorgeous nude with a shimmer" that never dries out her lips like others -- an important facet for a busy woman.
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