Seeing these K-Pop idols smile will make your heart flutter and give you an all-day mood boost!

When it comes to "K-Pop eye smiles", perhaps most, if not all, will turn their heads to Girls' Generation's Tiffany. It's like her eyes literally sparkle when she smiles.

Seungyeon's vibrant and lively eye smile makes you want to smile as well.

Sulli's cute and youthful eye smile makes her look like the little sister you've always wanted.

Ga In may be putting on a seriously fierce font, but when she flashes that eye smile a lot of hearts would definitely melt.

A lot of K-Pop fans are definitely missing Nicole and her pretty squinty eyes.

Girl's Day may have recently promoted with a sexy comeback, but Minah's innocence shines through her angelic smile.

Eunji's also one of those K-Pop girls with innocent smiles, certainly befitting of A Pink's image.

We all fell in love with Shin Min Ah in "My Girlfriend Is a Gumiho", and who wouldn't?

Lee Hyori's got the perfect bod and the perfect smile, too.

CL may be the "Baddest Female", but she also has one of the sweetest smiles around.