Music to one's ears
-America joining the war effort was music to the ears of the British in World War 1.
-Richard telling his wife that she was right was music to her ears.
-Gavin hearing that he got a raise was music to his ears.
Definition: Something you want to hear.
Etymology: Music is very pleasant to listen to.
Other examples:
1. To many parents or grandparents, baby's imitation of swearing is music to their ears. They don't realize that they are encouraging young children to pick up foul language.
2. Smart flattery is music to every one's ears! We need to be aware of it.