By Chiara Fiorillo Getting an advertising slot during the Super Bowl is a dream for many companies as the event is among the most watched on the planet and can be an opportunity to cash in quite a lot. Last year, an estimated 113million viewers tuned in for the event, according to average audience estimates. This year, hundreds of millions are expected to watch the major events with the Kansas City Chiefs taking on the San Francisco 49ers. While everyone tunes in to watch the action on the field, other key parts of the Super Bowl are the halftime show which sees superstars perform in front of …