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InStyle.com: The 15 Best Star Beauty Tips of All Time

13 of 16

Master the Art of Smiling

"An actress friend of mine shared a great trick. She told me to stick my tongue behind my teeth when I smile to keep from over-smiling. If you smile without doing it, sometimes your gums show a little too much. It's an actor's trick!" —Jessica Chastain

(CREDIT: Jason LaVeris/Getty Images)
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InStyle
The opinions expressed are solely those of the author and do not necessarily reflect the views of Comcast.

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