What are some really good love songs that i can sing?

i am going to be singing infront of my school this year and i was wondering if you could tell me any good love songs that i can sing. And i really mean some timeless love songs that my parents would know (and they are in their 30's) Any by celine dion or even taylor siwft or miley cyrus, anything that my school wouls be amazed by. I can sing quite high, but not REALLY high, i can handle some songs by leona lewis like keep bleeding, but can you please recommend some really good timeless love songs. thank you