Song in the Heart

Along with the Word for hope, encouragement, and joy, sometimes I need to hear a song, or a few songs. Do you have a song in your heart? A song that help carry you through the day? 
For me I would say it is "Amazing Grace".  I can sing that song and by the time I get to a particular verse, I break out into worship and praise. 
What is your song? Share it with me in the comments, maybe someone else can be encouraged by your song... 
If you do not have a song, maybe you will have one after reading one in the comment section....
Blessings!!  
Psalms 100