No matter what language you speak, a smile is universal. And catchier than the flu. Doesn't this image make the corners of your mouth curl involuntarily? Crest 3D White invited me to Barcelona to find out what makes Shakira smile. As a Crest brand spokesperson myself (check out my commercial), I wanted to share some smile-worthy things with you guys. But I also want to hear yours. So as you click through this story (teaser: there are pudgy babies involved!), prepare to grace your grin in Crest 3D White's Global Smile Gallery.

Even though they're identical, my twinsies Miles and Sam have distinct personalities. Sam makes me smile for zillions of reasons. Here are five:

1. He takes his time warming up to new people. Once he does, he loves you and offers you his toys and Cheerios.

2. He has rhythm. In fact, he swivels his hips and shoulders to jazz so enthusiastically that he looks like an "Elf Me" animation.

3. His belly laugh is deep, long-lasting and charming. 

4. When he is curious about something, he intently focuses and examines it.

5. He loves to smile. He blow kisses by slapping his palm against his open mouth, then high-fiving.

Miles also makes me smile for zillions of reasons. Here are five:

1. Miles has always had jazz hands. Even during ultrasounds. He's a gregarious and loveable monkey and waves at everyone

2. He's loves snuggling with his gray bunny and rainbow bug. He loves rolling on the floor and splashing in the tub.

3. When Miles is really excited, he runs on his tippy toes and and blushes. His giggle sounds like there's helium involved. I could listen to it all day. 

4. Before bedtime, Miles likes me to pick him up and bring him around the apartment so he can point and wave goodnight to everything, including the oven and sofa. He diligently practices saying words incorrectly. 

5. He loves to smile from all angles, including upside-down and sideways. 

Squeal when you get a stubbly smooch.

Celebrate your natural beauty with a sparkling grin.

Magnify your happiness.

Brush with greatness.

Beaming smiles warm the heart.

Toothless laughs are just as fun.

If you see something, say something.

It's an easy workout. 

Some lines really are fine.

No matter how chic your shoes are, wear one of these.

This should be happening.

Regift :) , not ugly sweaters.

Do the math.

Don't know what "sourire" and "gwenu" mean? Your pearly whites speak volumes.

Shakira and Crest 3D White want to hear your Smile Story. So snap a photo of yourself smiling, and upload it to Instagram, Facebook, Vine or Twitter with a caption including #3DWhiteSmile. You will be included in Crest 3D White's Global Smile Gallery with Shakira and other fans around the world who collectively embrace the power of their smiles.