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Guaranteed to Raise a Smile

Purple Clover Logo By John Birmingham of Purple Clover | Slide 1 of 26: <p>Say cheese! It's National Smile Power Day! You know Carly Simon has reason to celebrate. Now click through for 25 more snapshots that capture some of the most famous smiles of all time.</p>

25 snapshots of the most infectious celebrity smiles ever

Say cheese! It's National Smile Power Day! You know Carly Simon has reason to celebrate. Now click through for 25 more snapshots that capture some of the most famous smiles of all time.

© Ron Galella/WireImage
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