The 2000-2010 decade saw both happy events like music festivals as well as tragic events such as the 2004 Indian Ocean tsunami and 9/11. In music, popular DJs included David Guetta, the House Mafia, and PSY. Avatar became the highest grossing film of all time. Fashion trends included Daisy Dukes shorts and baggy pants. By the end of the decade, inventions like calculators and satellites had changed lives and a robot walked on Mars for the first time.