It had drummed up 22m views on YouTube by the first week of January, ahead of the 16.6m clocked by Sainsburys ad featuring First World War soldiers sharing a bar of chocolate, the UKs next most popular ad of 2014.

It had 22 million views on YouTube by the first week of January  more than the 16.6m views of Sainsburys ad with First World War soldiers sharing a bar of chocolate, the UKs second most popular ad of 2014.
