Need you ask?
What's your favorite "feel good" song?
Going to California by Led Zeppelin always makes me smile.
https://www.youtube.com/watch?v=N_MqfF0WBsU
Tomorrow it will be something different...
Kashmir by led zeppelin
good vibrations
Some Girls by the Turtles ..
Yay!!! I went searching for a music Q and I found it :) this song makes me happy then ..... Cos I'm the best around ..,
There are a lot, but this is the first one that came to mind today.