The 10 Most Watched Ads on YouTube in December

Sandy Hook Promise's "Evan" PSA may have been our pick for the most engaging ad of December. But Shell's "Best Day of My Life" video with Jennifer Hudson, released way back in September, got a major second wind last month—pulling in three times as many views as "Evan" and taking the top spot on Adweek and Google's monthly YouTube Ads Leaderboard ranking the most watched ads on the platform.

"Evan" finished fourth, as it turns out, also trailing Google's "Year In Search 2016" and the Clash of Clans "Hog Rider 360" video, the latter of which also had staying power, having made the list in November, too.

Elsewhere on the list are a Visit Dubai spot and an Arm & Hammer collaboration with BuzzFeed for its Truly Radiant teeth whitening branding.

Check out all 10 spots below.

Note: To be eligible for Adweek and Google's YouTube Ads Leaderboard, videos must be marked as ads on YouTube (i.e., they get some paid views) but must also earn significant organic views. The algorithm factors in paid views, organic views and audience retention (how much of a video people watched). The views counts are for the month in question only, though the ads could have been uploaded in prior months and have much higher view counts total.