Caterham driver Heikki Kovalainen will wear a helmet with a new striking design during the Australian Grand Prix. His helmet is marked with a red bird featuring in the immensely popular smartphone-game Angry Birds. The new design is the result of a new sponsorship deal between Kovalainen and Rovio, the creators of Angry Birds. Both the company and Kovalainen are Finnish.
Since Räikkönen and Kovalainen are both Finnish it's very plausible Rovio chose to close a sponsorship deal with them both.
Smart move by the company