21 Celebrities Who Had a Little Help Getting Those Gorgeous Smiles (PHOTOS)

These celebs have a lot to smile about. They know that nothing transforms an appearance and says, "Hello, world!" quite like a gorgeous grin. Some of them probably paid big bucks for their megawatt smiles, but it was totally worth it. They each look amazing.

Find out which of your favorite stars had a little help getting their gorgeous smiles. Which ones did you predict?

Image via Splash News/Splash News/Corbis

Miley Cyrus

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Image Press/Splash News/Corbis

Miley Cyrus has straightened up one thing since her Hannah Montana days, and while we can't say it's her act, her teeth sure look great!

Denzel Washington

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Jack Abuin/ZUMA Press/Corbis

Denzel Washington has good reason to show off his dazzling (veneer) smile. The star just won the Cecil B. DeMille Award at the 2016 Golden Globes.

Katy Perry

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Splash News/Splash News/Corbis

Keith Urban

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Debby Wong/Corbis

You'll have plenty of time to get a good look at Keith Urban's sparkling smile. The country singer just announced his upcoming worldwide RipCORD Tour kicking off June 2 in Kansas City, Missouri. 

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George Clooney

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Jeffery Duran/Celebrity Monitor/Splash News/Corbis

What would the Sexiest Man Alive be if he didn't have a stellar smile to show off when he accepts those Oscars? With a history of teeth grinding (we get it, the industry is stressful!), Clooney opted for veneers to lengthen his teeth.

Jennifer Garner

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Walter McBride/Corbis

Girl next door Jennifer Garner is typically seen sporting her kids around in her casual attire. But don't let the actress fool ya! Garner's megawatt smile proves her star quality.

Zac Efron

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He shot from teen heartthrob to hunk! The Neighbors star closed the gap in his teeth with a set of veneers, making him even hotter (if that is possible).

Emily Blunt

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Splash News/Splash News/Corbis

The actress may have undergone a procedure or two, including cosmetic dental work. The Sicario star is beautiful nonetheless.

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Tom Cruise

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Was it a "Mission Impossible" for Mr. Cruise to change up his smile since his role as Steve Randle in The Outsiders? Nope. Just a set of pearly veneers!

Jessica Alba

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Xavier Collin/Image Press/Splash/Splash News/Corbis

This actress and entrepreneur proves women really can have it all! She's the mom of two, founder of the Honest Company, a Golden Globe nominee, and she has a new role in the upcoming supernatural thriller The Veil. Oh, AND a killer smile!

Ben Affleck

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The actor can thank director Michael Bay for his superior smile. The Armageddon director reportedly ordered Ben Affleck's dental work, upwards of $20,000, to make the actor's smile as noteworthy as his character in the film.

Lindsay Lohan

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Splash News/Corbis

LiLo's less-than-healthy lifestyle choices left her chompers begging for attention. Looks like they got them! The star's smile is luminous! 

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Demi Moore

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Xavier Collin/Image Press/Splash/Splash News/Corbis

Demi Moore certainly doesn't look her age. A decade ago, the star's teeth were reportedly stained and less than perfect. These days, Moore's new smile only enhances her youthful appearance.

Hilary Duff

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Xavier Collin/Image Press/Splash News/Corbis

Blame it on the mic! After chipping her tooth on a microphone, the already adorable Hilary Duff opted for a set of veneers.

LeAnn Rimes

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Xavier Collin/Image Press/Splash/Splash News/Corbis

Getting her radiant smile didn't come easy for this country singer. LeAnn Rimes claimed to have endured three years of poor dental work and subsequently sued her dentist. She says she suffered from severe tooth pain, gum inflammation, and chronic gum bleeding as a result.

Alessandra Ambrosio

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@Parisa/Splash News/Corbis

The Brazilian Victoria's Secret Angel looks incredible with a lovely set of veneers.

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Catherine Zeta-Jones

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Walter McBride/Corbis

Even during her struggling actress days, Zeta-Jones had a brilliant smile. The actress's set of veneers closed her gap and made the star even more radiant.

Kate Beckinsale

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Xavier Collin/Celebrity Monitor/Splash News/Corbis

Landing star-worthy roles (Pearl Harbor) was a game-changer for actress Kate Beckinsale, and so was her gorgeous set of veneers! These days the Underworld: Awakening actress looks red carpet–worthy seemingly all the time.

Cheryl Fernandez-Versini

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X Factor UK judge (and executive producer) Cheryl Fernandez-Versini may not be smiling with rumors of her brief marriage to coming to an end. But, we think the multitalented star, who has FHM's Sexiest Woman in the World title under her belt, will be just fine. After all, she is set to release her fifth studio album later this year.

Chris Rock

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Xavier Collin/Celebrity Monitor/Splash News/Corbis

Probably one of the biggest smile transformations in Hollywood belongs to Chris Rock, who allegedly used part of his earnings ($150,000) from Lethal Weapon to transform his grin.

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Nicolas Cage

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Xavier Collin/Image Press/Splash News/Corbis

The things actors do for their craft! In 1984, Nicolas Cage had two teeth pulled for his role in Birdy. Thanks in part to a new grill (we assume), the versatile actor went on to have both a winning smile and Oscar-winning roles.