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The P&G global ad, created by Wieden & Kennedy Portland, was launched this week and straight away became one of the most shared ads from an official Olympic sponsor.

It features mums from all over the world supporting competitors at every age, as they develop from child athletes to Olympians.

It was directed by Alejandro González Iñárritu, the man behind Nike's 'write the future' World Cup 2010 campaign and films including 'Babel'.

TNT Benelux's "dramatic surprise", which was shared more than 1.2 million times last week, increased its shares across Facebook and the blogosphere by 922,067 shares week on week, to be shared 2.1 million times.

A public service ad for US organisation Safer Sex For Seniors, showing fully-clothed elders practising sexual positions, has entered the chart in tenth position with more than 40,000 shares.

The ad, by DDB New York, was mentioned in 73 blog posts and has been viewed nearly 800,000 times.

Elsewhere in the chart, Google's "project glass" continued to inspire, with more than 60,000 shares this week, while two Nike ads placed in fourth and ninth position with 159,990 and 41,367 shares respectively.

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.

Due to technical issues with Twitter's API, shares from the social network were not included in the count.

All time: 190,369 shares