With a Twitter following over 2.5 million. Ashton Kutcher (@aplusk) certainly has the ability to drive traffic around the web. Barrack Obama's media team haven't let this go unnoticed, asking the popular actor to tweet a link to a video promoting National HIV Testing Day.
Kutcher obliged with the following tweet linking to a video address by Barrack Obama:

The Obama team is well known for its social media prowess, including asking Twitter to stay open for Iranian protesters. The HIV Testing Day video has generated over 1790 retweets at the time of writing, including many generated from the official @whitehouse and @barrackobama accounts accounts.
It does not appear that Kutcher was previously affiliated with National HIV Testing Day.
Have you seen Australian celebrities using social media to promote similar public health initiatives? Let us know in the comments below or reply via the Digital Media Twitter account @digitmedia