A dog and an orangutan make unlikely chums in the Google Android "Friends Furever" ad. YouTube / Google A Google commercial dubbed "Friends Furever," which featured cute animals of different species being buddies, was the most shared ad of 2015 — and has become the most shared ad of all time — according to data from video ad tech company Unruly.

The Google ad has been shared 6.4 million times since February this year, according to Unruly's analytics system, which counts the number of shares across Facebook, Twitter, and on blogs.

The previous most-shared ad was Activia's 2014 World Cup ad, "La, La, La" starring Shakira, which was shared on social media just under 6.1 million times.

Check out the top 10 most shared ads of 2015 below featuring spots from Disney, Budweiser, Microsoft, and more.