1. Allison Williams
This leading lady stars in 'Girls' and has a gorgeous smile. It's a good thing with all the laughing that she probably partakes in on set.
2. Lea Michele
Lea's smile has not gone unnoticed in the past. You can't miss it. We got tips on how to get a brighter smile from her dentist.
Tips From Lea Michele's Dentist!
3. Denzel Washington
Oh, Denzel. Your smile brightens our day. Denzel can step on stage knowing that he not only makes ladies swoon with his strong voice, but also with his shiny teeth. How many people can do that?
4. Sofia Vergara
The 'Modern Family' star gets maj points for her witty jokes, fashion-forward outfits, and that smile.
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5. James Marsden
Remember that scene in 'The Notebook' when James proposes to Rachel McAdams and flashes an ecstatic smile? That's when we fell head-over-heels for this boy.
6. Michelle Obama
It's probably not a requirement for the First Lady to have the shiniest teeth in the world, but it's definitely not taking any popularity points away from this fabulous woman! Add Michelle's smile to the "Reasons OK! Loves Michelle Obama" list.
7. Heather Thomson
'Real Housewives of New York City' star Heather Thomson knows how to sport a smile and run a business.
It's totally appropriate that Rihanna sings the song "Diamonds"—just look at her smile!
To get perfect ivories like Rih's, try Luster Premium White 1 Hour White Light Teeth Whitening System. It makes your smile 6 shades brighter without any annoying sensitivity issues. Available for $43 at lusterpremiumwhite.com.
9. Mario Lopez
This TV personality has got to floss like 12 times a day. Do you see that smile? His dentist must be SO proud.
10. Katy Perry
Katy's cleavage wasn't her only feature getting attention at the Grammys. Say cheese, Katy! Do you think she was extra giggly because she was sitting next to John Mayer?
11. Kourtney Kardashian
Yep, a Kardashian made our list. Kourtney is the sister who got our award for "Best Smile."
12. Zac Efron
Zac, Zac, Zac. You give us too many reasons to love you.
13. Taylor Lautner
Werewolves need to have healthy teeth, and this 'Twilight' hottie is a total catch when he flashes his pearly whites.