Who led the infamous Spanish Inquisition starting in the late 15th century?

Tomás de Torquemada

Who sings the famous song 'Thriller,' popular around Halloween? The city of Valencia is located in which European country? Which group is responsible for the hits "Waterfalls" and "No Scrubs"? What name is given to the series of military expeditions carried out by Christians against Muslim territories? What traditional game involves tapping eggs against each other until one cracks?