soccer
Actually I believe the current most watch sport "on TV" is Formula 1 Racing. 527 million people watched F1 in 2010
football
Football
cricket
The most watched world TV broadcast is the Fifa World Cup competition. The 2014 World Cup was hosted by Brazil and it happens after four years.
Football with ver 25 million viewers every week
The Most Watched Sports in the UK is Football, only because you cant get away from it, its always on the TV, the second most watched sport at the moment is Cricket when Football is not on that is, but if you would like to know what the second most popular sport is. well its Hockey ("Field") after Football that is but unfortunately it is hardly on the TV at all and Rubgy, Cricket is probably in the top 5
the world cup
BBC's program Top Gear which is about motor vehicles is world's most watched TV program. It has a weekly audience of 350 millions world over.
National Geographic Specials
After the Olympic Games is the second most TV watched competition in the World
Yes. Yes. Yes.
Car racing is very popular. It is one of the world's most watched television sports.