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Following , the young Beckham is seen sporting Burberry's Spring/Summer 2013 collection in the ad, produced in-house. The ad takes seventh place for being shared nearly 11,000 times.

Keeping with the family theme, tennis stars Venus and Serena Williams appear in an ad for Apple's iPhone 5.

Shared just short of 4,000 times, the ad created by TBWA / Media Arts Lab, promotes the device's "do not disturb" functionality and places eighth on the chart.

Still mopping up shares, YouTube's "rewind YouTube style 2012", created by agency Seedwell, falls one place into third with more than 30,000 shares.

Jumping into first place this week is an ad for Fiat by Krow Communications and Rubber Republic, which was shared 90,000 times. The spoof film featuring a rapping mother comically captures the essence of modern motherhood.

Elsewhere, an ad for Coca-Cola directed by Hollywood director Ridley Scott, was the fourth most shared ad with 27,000 shares.

To view the most-shared viral ads from previous weeks visit the .

The chart, , ranks ads according to the number of times they have been shared on Facebook, Twitter and the blogosphere.

Ads launched more than 30 days ago are not included.

All time: 1,261,348 shares