Which musical film stars John Travolta and Olivia Newton-John?

Grease

In Japan, what American fast-food restaurant experiences booming business on Christmas? Baking soda and baking powder are examples of what group of ingredients used to raise batter or dough? In "Prancer," which animal does Jessica Riggs believe she's found? In which year was America's centennial celebrated? Which disciple denied Jesus three times before the rooster crowed?