1. 1. Pandas Play on a Slide, Cuteness Ensues
   

   These sliding pandas went viral during Chengdu Panda Awareness Week. Meanwhile, our hearts melted in a gooey pile of black and white love.

2. 2. This Adorable ‘Lip-Dub’ Marriage Proposal Is Worth Watching Now
   

   What wedding proposal is complete without Broadway dancers, a lip-dubbed version of “Marry Me” and a backwards driving car? This video gets our nod for most creative proposal of 2012.

   Yes, we’ll marry you.

3. 3. Curiosity Rover Lands on Mars: Watch NASA Mission Control Go Crazy
   

   The Curiosity rover was one of the biggest celebs of 2012. While it’s only on Mars for two years, this video of Mission Control going bonkers after its successful landing will be in our hearts forever.

   Don’t kid yourself, we know you were crying more than that dude with the mohawk.

4. 4. If Life Gives You Lemons, Give Them to This Beagle
   

   This beagle eats a lemon. There’s not much more to it. And yes, you will make that lemon-sucking-cringe face the entire time.

5. 5. World’s Coolest Dad Sends Toy Train to Space
   

   Sorry dads, this guy just knocked you all out of the running for World’s Coolest Dad. He not only sent his son’s favorite toy into the stratosphere, he made an awesome video and was able to return the toy train using GPS.

   Don’t worry, the rest of you dads, there’s always 2013.

6. 6. Sad French Kitty Wins ‘Best Cat Video on the Internet’
   

   He’s French, he’s sad, he’s a cat.

   Watch and be amazed. Then head to the cat store for your own.

7. 7. Presidential Campaign Makes 4-Year-Old Cry
   

   Abby, you captured the feelings of an entire nation in so few words.

   Abby for President 2016.

8. 8. Caine’s Arcade: Cardboard Creation Inspires $90,000 Scholarship
   

   This nine-year-old boy just out-entrepreneur-ed the rest of America. He used cardboard to build an entire arcade — complete with business plans — and then became an instant viral hit as the star of this documentary.

   His story is so sweet, he should run for president in 2016 with Abby.

9. 9. Baby the Bulldog Adopts Wild Boar Piglets
   

   Baby piglets, bulldogs and lots of love in our favorite adopted pet story of the year.

10. 10. Aly Raisman’s Parents
    

    Mr. and Mrs. Raisman, you undeniably take home the gold medal for most supportive, anxious parents during a gymnastics competition. Ever.

    Way to stick that landing.

11. BONUS: U.S. Marine Surprises His Beagle Dog

    The year 2012 marks the 237th anniversary of the Marines, so in honor of the troops, here’s a dog welcoming home his dad.

    It’s okay if you laugh and cry at the same time.

Read more: http://mashable.com/2012/11/14/cutest-videos-2012/