I can never listen to I Feel It Coming by The Weeknd the same anymore. When it starts all I will ever think about is Yousef dancing and his embarrassed face when he sees Sana. It feels so innocent and cute and all those feelings come back when I listen to the song
In the topic of Dean grieving Cas in season 7, when Dean sings to Air Supply you can see that when Sam turns the radio on Dean's face makes Sam apologize. Like, I don't know how to word it, but didn't it seem like Sam knew the song was making Dean sad (because Dean was grieving Cas)? Right before Sam turns on radio Dean cuts off the little pony with wings, and I think that is the biggest clue that the scene was all about Dean's grief for Cas death. S7 is so much deeper when you see the Destiel.