 Do you have a favorite love song? Is it upbeat? Better put it on repeat because you may not like the new ones. Researchers say love songs are changing. One looked at the Billboard Top 100. 86% of them had an insecure attachment style. What today's love songs say about us? That's tomorrow on Morning Edition from NPR News. And join host Erwin Gratz for Morning Edition tomorrow morning beginning at 5 o'clock.