My Feel Good Song

Do you ever have a feel good song?  Like when you're down and you need cheering up, hearing a particular song would make you feel a little better?

Ever since I heard the cover version of  "I'm Glad You Came", I decided to make it my officially feel good song for now. 

I would feel light and bubbly (like champagne!).   It gives me this happy feeling inside and makes me think only of good things.

 So, what is your "feel good song"?