12 Sweetest Parenting Moments on Youtube -- How Can You Not Smile?

From baby Jonathan hearing his mother's voice for the first time to an Idol-worthy mother-daughter duet, we dare you not to smile at these amazing moments.

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All Ears
After receiving a cochlear implant, this eight-month-old hears his mothers voice for the first time.

Baby's First Steps
Yes, this little girl's joy at walking her first steps is a beautiful thing. But her proud papa's reaction to the same feat is truly priceless.

Quadruple the Fun
One baby laughing is a beautiful sound. Four identical tots giggling along with their mom? Amazing.

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Welcome to the World!
This mom was lucky enough to catch the moment her newborn daughter opened her eyes. Welcome, little one!

In Perfect Harmony
The little one steals the show in this mother/daughter duet of Leona Lewis's "Bleeding Love" (Skip to :58 for the best part!)

Dad Gets in Crib
This flexible father has no trouble getting into his baby's crib to successfully stop her from crying. It's getting out that's the tricky part.

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The Best Day of School
This Iraq vet surprised his son at school after a long deployment - and stole our hearts by sharing this tender, special moment.

Last-Day Surprise
This inspiring veteran does the same for his daughter. After promising her he'd make it back by the end of 4th grade, he arrives for her last day before summer.

Father and Son, Running Together
This hero dad runs marathons and triathlons to show his disabled son that anything is possible. This is not only sweet, but also truly inspiring.

Twice as Nice
When this grandma finds out from her daughter, a mom-to-be of twins, that she's having two new grandsons, you can't help but share her enthusiasm.

Baby's First Words
This baby's first words are "I Love You." Really.

Daddy Plays Dress Up!

Another enthusiastic dad plays dress up with his daughter. Check out the earrings!

See 18 more heart-warming videos at Babble, then let the awwwwws resound!