Shares: 1.7 million
This heartwarming ad showcases the giving spirit of the holidays with an airline company providing its customers exactly what they wished for.
Shares: 588,105
A look back at some of the most popular YouTube videos, with special cameos from the platform's biggest stars.
Shares: 383,939
What happens when two world-class athletes have a competitive streak and a lot of free time? A selfie battle.
Shares: 380,395
This is a fresh take on a classic holiday song with some stylish boxers.
Shares: 366,155
Here's a simple ad about how things aren't always as they seem, even when it comes to teenagers and smartphones.
Shares: 301,477
Why just do a simple split when you can do one balancing on two trucks driving backward?
Shares: 298,541
These Internet-famous cats show how the holidays aren't always feline-friendly.
Shares: 292,818
The best soccer players on Earth gather to defeat aliens in the ultimate match, equipped with the latest Samsung tech.
Shares: 273,396
The future is coming -- or maybe that's just your package flying in on a Prime Air drone.
Shares: 231,414
Pro tip: Never take beans on interstellar missions -- while delicious, they might get you mauled by aliens.
December was full of holiday celebrations, so it's no surprise that some of the month's most popular ads revolved around the seasonal spirit of giving, family and fun.
You've probably already laughed or cried with more than one of these videos, shared widely on YouTube and compiled into this list by Unruly Media.
See also: YouTube's 10 Most-Shared Ads in November
Even though December was plagued with snow-white, happy family advertising, some products dared to do more to stand out. International athletes one-upped each other's selfies and prepared for an intergalactic soccer match, while audiences learned that canned food is great for cats, not for astronauts.
For the holidays, WestJet showed the world that giving can be a rewarding experience, while Apple demonstrated that sometimes things are not as simple as they initially seem.
Have something to add to this story? Share it in the comments.
Hompage Image: YouTube, Samsung Mobile