What is the most watched television event in history?

Princess Diana's funeral was a big contender. Wiki says: There are no exact figures available for global television events. However, a report by IPG media agency Initiative Worldwide stated that the 2006 FIFA World Cup was the most-watched sporting event of that year with an average 1.2 billion viewers per match [31]. Such statistics have, however, proved controversial, failing to stand up to scrutiny [32], and audience figures cited in billions are practically unverifiable. It is popularly believed that the British TV show Top Gear is one of the most watched shows around the world. It is broadcast in 117 countries and is purportedly watched by up to one billion people.[33] The funeral of Princess Diana was watched by an estimated 2.5 billion people.[34] The 2008 Summer Olympics Opening Ceremony from the Beijing National Stadium in Beijing, China was watched by an estimated four billion viewers worldwide.  more