The 11th World Championships in Athletics, (Japanese: 2007年世界陸上競技選手権大会) under the auspices of the International Association of Athletics Federations (IAAF), were held at Nagai Stadium in Osaka, Japan from 24 August to 2 September 2007. 200 of the IAAF's 212 member federations entered a total of 1,978 athletes, the greatest number of competitors at any World Championships to date. Sarah Brightman, the world's best-selling soprano, performed her single Running at the opening ceremony.