1. Grease
Good girl Sandy fell in love with bad boy Danny during school break, and they thought it would only be a summer fling. But when they found out they went to the same high school, they struggled to rekindle their romance even though they were from two completely different worlds. The movie was so iconic that we still have frequent remakes, musicals, and even high school productions today. No matter how old you are, you know about Grease!