Campaign Viral Chart: Pepsi and Beyonce lead celeb-heavy list

Pepsi's spot starring music megastar Beyonce is the most-shared ad this week after generating 226,737 shares across Facebook, Twitter and the blogosphere.

The ad, created by agency 180 LA, features a full cast of Beyonces – past and present – staring out from a collection of mirrors, and is joined in the chart by a making-of feature, shared an additional 34,000 times, at number four.

A man who is used to coming first, Usain Bolt, lags behind Beyonce in fifth place with 25,209 shares this week, in a teaser ad for Samsung's new NX300 smart camera.

The six-time Olympic Gold medallist takes to the starting blocks once again in the spot, created by Cheil Worldwide.

Meanwhile, in eighth place, John Terry and eight of his Chelsea FC teammates appear in an ad from Adidas to promote pre-sales of the Chelsea FC replica kit.

The ad, created by The Corner, has been shared 15,675 times this week.

To view the most-shared viral ads from previous weeks, visit the Brand Republic viral video board on Pinterest.

The chart has been produced in association with Unruly and ranks ads according to the number of times they have been shared on social media and across blogosphere.