You're a star! 你真棒！
The use of Christmas lights goes back to 18th-century Germany where they decorated Christmas trees in wealthy homes. Christmas trees displayed publicly and illuminated with electric lights became popular at the beginning of the 20th century. In Britain, string of lights displayed on Christmas trees, walls and doors are called "fairy lights".
当某人帮你解决了大难题时，你可以说 “ You are a star! 你简直就是明星！” 意思是，你真厉害或你真棒。
The dinner party I invited my boss to was a success thanks to Mary. She cooked the main dish. She's a star!
I've got so much work to do. I'm happy you've offered to help. You're a star!
当有什么事情偶然发生，类似不幸中的万幸，人们可能会说 thank your lucky stars.
John thanked his lucky stars his teacher didn't catch him cheating in his exams. He'd have been immediately expelled from school.