The Jackass star Ryan Dunn, who died in a car crash on June 20, was the most searched-for subject in the world on Google over the last seven days as fans of the unconventional stunt man searched for news of his death and his best friend.     

Dunn, who died at the age of 34, was best known for his role in the offbeat TV show Jackass, which saw members of the cast taking part in increasingly bizarre and frequently dangerous stunts. 

One of Dunn's best friends, professional skateboarder and actor Bam Margera, has been the subject of several news reports after appearing at Dunn's funeral and making an emotional visit to the site of Dunn's death.  

A news report of Bam Margera's sad outburst has attracted over one-and-a-half million views since being uploaded to YouTube on June 21.

Over the seven days prior to June 27 searches related to Dunn  and his friend Bam Margera appear four times in Google's top ten search results with the biggest increase in growth.

Other popular search terms over the last seven days included "Wimbledon" tennis tournament and J.K. Rowling's latest extension of the Harry Potter franchise, the Pottermore website.

The ten search terms with the most significant growth worldwide in the last seven days, as  measured by Google Insights and recorded on June 27, were:

01. ryan dunn (breakout*)
02. ryan dunn dead (breakout*)
03. ryan dunn death (breakout*)
04. bam margera (+2,300%)
05. summer solstice (+1,550 %)
06. firefox 5 (+550%)
07. wimbledon 2011(+500%)
08. wimbledon (+500%)
09. pottermore (+400%) 
10. michael jackson (+60%)

*Breakout defines a search term that has experienced a change in growth greater than 5,000 percent.